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Home » Content » 4854 » Myresults » 200922 » IASSC Certified Lean Six Sigma Black Belt
(ICBB) Practice Exam - Full
IASSC Certified Lean Six Sigma Black Belt
(ICBB) Practice Exam - Full
You got 105 of 150 possible points.
Your score was: 70 %
Question Results
Score 1 of 1
Question:
In a Fishbone Diagram the 6M’s stand for Methods, Measurements, Machine, Man,
Mother Nature and ____________.
Please choose the correct answer.
Response:
Materials
Medical
Management
Merger
Score 1 of 1
Question:
Correlation and regression are concerned with
Response:
The relationship between two quantitative variables
The relationship between two categorical variables
The relationship between a categorical explanatory variable and a quantitative
response variable
The relationship between a quantitative explanatory variable and a categorical
response variable
Score 1 of 1
Question:
Which of these are examples of business metrics or Key Performance Indicators
commonly referred to as KPI’s?
Please choose the correct answer.
Response:
Cycle Time
Defects
No. of Units Reworked
All of these answers are correct
Labor Hours
Score 1 of 1
Question:
What dollar amount of savings would a project showed gain of $8.5 million total and the
cost of bringing in automation in the project was $1.5 million?
Response:
$10 million
697000
$7.5 million
$7 million
Score 1 of 1
Question:
To establish a sample size that will allow the proper overlap of distributions we do
which of these?
Please choose the correct answer.
Response:
Multiply Alpha by 1.75
Calculate Beta plus 2
Calculate one minus Beta
Multiply Beta by 3
Score 1 of 1
Question:
Using this data calculate the percentage of DPU. Data: 484 defects, 15,000 units.
Please choose the correct answer.
Response:
3.23
4.56
5.93
2.74
Score 1 of 1
Question:
_________ is when more products are produced than are required by the next function
or customer.
Response:
Conveyance
Over Processing
Over Production
Motion
Score 1 of 1
Question:
A Belt working in a supply chain environment has to make a decision to change
suppliers of critical raw materials for a new product upgrade.
The purchasing manager is depending on the Belt’s effort requiring that the average
cost of an internal critical raw material component be less than or equal to $2,800 in
order to stay within budget.
Using a sample of 55 first article components, a Mean of the new product upgrade price
of $2,240 and a Standard Deviation of $120 was estimated.
Based on the data provided, the Z value for the data assuming a Normal Distribution is?
Please choose the correct answer.
Response:
4.67
2.33
8.28
6.48
Score 1 of 1
Question:
Who was the founder of Theory of Constraints
Response:
Juan
Pearson
Anderson Darling Test
Goldrat
Score 1 of 1
Question:
Let’s say you have a test score of 190. The test has a mean (μ) of 150 and a standard
deviation (σ) of 25. Assuming a normal distribution, your z score would be:
Response:
2.6
4.3
5
1.6
Score 0 of 1
Question:
A 3 sigma process will have _____ Quality%
Response:
100%
93.32%
None of the above
99%
Score 0 of 1
Question:
Which are common sources of variation in most measurement systems?
Response:
Humidity
Reproducibility
Altitude
Part to Part Variation
Repeatability
Measurement Instrument
Score 1 of 1
Question:
Who delivers the input for the CTQ?
Response:
CFO
Suppliers
process owner
Customers
Score 1 of 1
Question:
For the normal distribution, about _____% of the data fall within +/- 2 standard
deviation from the mean?
Response:
95
62
99
67
Score 1 of 1
Question:
What are some LEAN Six Sigma objectives?
Response:
Achieving business targets
Delivering business results
Customer satisfaction
All of the above
Reducing variation
Score 1 of 1
Question:
What is the statistic used for central tendency with normal data?
Response:
Mean
Quartile 1 (Q1)
IQR (interquartile range, Q3 – Q1)
Median
Score 1 of 1
Question:
Sally bought a blender from her local appliance store. When she changed blades the
blender would not function. For the manufacturer this would be categorized as what
type of cost?
Please choose the correct answer.
Response:
Appraisal Costs
Internal Failure Costs
Prevention Costs
External Failure Costs
Score 1 of 1
Question:
There is no need of revision of control limits once calculated by the equations of control
limits.
Response:
False
True
Score 1 of 1
Question:
Which statement(s) are correct about the Regression shown here?
There are 2 correct answers to this question.
Response:
The dashed lines indicate with 95% confidence where all of the process data
should fall between
The relationship between outside temperature and number of customers per
hour is a Linear Regression
The predicted number of customers per hour is close to 5 if the outside
temperature is 10 deg C
The dependent variable is the outside temperature
The dashed lines indicate with 95% confidence the estimate for the Quadratic
Regression Line
Score 0 of 1
Question:
What is NOT a difference between DOE modeling and physical models?
Response:
DOE describes the entire region of the experimental space
Physical models explain outside the area of immediate project needs and
include more variables than typical DOE models
A physical model is known by theory, using concepts of physics, chemistry,
biology etc.
Physical models explain within the area of project needs and include less
variables than typical DOE models
Score 0 of 1
Question:
Ways to increase Power of a test are
Response:
Use one tailed rather than 2 tailed test
All of the above
Decrease variance
Make alpha larger
Score 1 of 1
Question:
When a Belt Poka-Yoke’s a defect out of the process entirely then she should track the
activity with a robust SPC system on the characteristic of interest in the defect as an
early warning system.
Response:
False
True
Score 0 of 1
Question:
The Central Limit Theorem says that…
Response:
The sample means of many iterates of samples will approach being normally
distributed regardless of the underlying distribution from which the samples
were drawn.
A sample will always show the correct distribution if the sample size is above
100
A sample will always show the correct distribution if the sample size is above
30
A sample will always show the correct distribution if the sample size is below
30
Score 0 of 1
Question:
Which of these statements are true for a normal curve?
Response:
It is symmetrical on both the sides of most frequently occurring value and The
area under the curve represents 100 percent of values in the process
It indicates non-random variation in the process
Only It indicates non-random variation in the process
The area under the curve represents 100 percent of values in the process
It is symmetrical on both the sides of most frequently occurring value
Score 1 of 1
Question:
Producing more than is needed by the next step in the process or more than the
customer needs is an example of which of the Seven Elements of Waste?
Response:
Inventory
Overproduction
Motion
Correction (defects)
Score 1 of 1
Question:
What is the primary purpose of linear correlation analysis?
Response:
To calculate 'q'
To measure the strength of the linear association between two variables
To get an average indication
To calculate 's'
Score 0 of 1
Question:
What is the benefit with CI compared to Hypothesis Testing?
Response:
More accurate
Fail Proof
the hypothesis testing approach would need to be recomputed with any change
in the value of the proposed standard
No benefit
Score 0 of 1
Question:
An operator checks that all boxes being packed contain enough products to fill the box.
However, each box getting filled has a different number of products in it.
This is a Reproducibility problem, not a Repeatability problem.
Please choose the correct answer.
Response:
False
True
Score 1 of 1
Question:
In a good Measurement System the most variation will be with part-to-part
measurements. What should you do if the majority of variation is associated with the
Gage R&R assuming the gage is technically capable?
Please choose the correct answer.
Response:
Run another MSA test with the machine
Focus on fixing the Repeatability and Reproducibility of the measurement
device
Purchase a new machine
Focus on trimming the Part-to-Part variation
Score 1 of 1
Question:
In order to calculate the ROI for a project it is necessary to have which two metrics?
Response:
Training costs and project capital costs
Project capital costs and project savings and/pr revenue increases
Project savings and/or revenue increases and inventory value
Project savings and/or revenue increases and total costs
Score 1 of 1
Question:
A dock worker for a feed supplier was tasked with assuring the proper weight in the
feed bags as they left the dock. One of the columns listed the range of weight of the bags
included in the studies. This required plotting a Histogram of the weight of the bags.
While drawing the Histogram the x-axis contained a certain scale of data. Pick the scale
of data that is appropriate for Histograms.
Please choose the correct answer.
Response:
Ordinal Scale Data
Interval Scale Data
Ration Scale Data
Nominal Scale Data
Score 0 of 1
Question:
Which of the following is not a mode of collecting the VOC data?
Response:
Customer complaints
Decomposition
Be a customer
Demographic surveys
Score 1 of 1
Question:
__________ is the difference between the observed value and the true value of a
measurement?
Response:
Bias
Stability
Capability
Precision
Score 1 of 1
Question:
Say there is a manufacturing process with 3 steps – Processes 1, 2, and 3. Let’s also say
that on a particular day they note the following performance
Process 1: 100 parts passed through this process and 84 “good” parts left this process
(scrapped 16)
Process 2: With some WIP laying around 110 parts passed through this process with 82
“good” parts passing (28 scrapped)
Process 3: With even more WIP laying around this process they managed to produce 138
parts with 126 parts passing (12 scrapped).
Calculate RTY
Response:
0.8596
0.57
0.6765
0.501
Score 0 of 1
Question:
A ________ is a graphical tool to present the distribution of the data
Response:
Fishbone Diagram
Multi-Vari Chart
Histogram
Box Plot
Score 1 of 1
Question:
How is the transformation of non-normal data into normal data done?
Response:
Using Chart
Using statistical tools
Using a mathematical function to transform data
Using Cox plot
Score 1 of 1
Question:
When the Inputs, X’s, for your process are Normally Distributed about the Mean, the
Outputs, Y’s, will be Normally Distributed.
Please choose the correct answer.
Response:
True
False
Score 1 of 1
Question:
A study is to be carried out on a litter of puppies.
Information about the first puppy has been captured:
The analyst has stated that statistics on the appearance and personalities of the puppies
cannot be measured, because this type of data cannot be counted or measured.
Is this statement correct?
Response:
Yes, because discrete data can only take certain values
No, because qualitative data can be converted into discrete data
No, because continuous data can be measured on a variable scale
Yes, because qualitative data cannot be measured or counted
Score 1 of 1
Question:
Which of the following is called value added activity?
Response:
Painting a part
Repainting a defective part
Painting a part ahead of schedule
Carrying a part to painting area
Score 0 of 1
Question:
Which of the following situations does NOT indicate that the simple linear regression
model is statistically significant?
Response:
p-value of the F-test of ANOVA is lower than the alpha level
F-statistic of ANOVA is smaller than the critical statistic
F-statistic of ANOVA is greater than the critical statistic
correlation coefficient between the dependent and independent variable is close
to 1
Score 1 of 1
Question:
__________ is a measure of the distance between the average value of the measurements
and the "True" or "Actual" value of the sample or part
Response:
Precision
Linearity
Bias
Repeatability
Score 1 of 1
Question:
Which item(s) listed would impact the Process Capability for a process with a
continuous output?
There are 4 correct answers to this question.
Response:
Seasonal variation in process
Presence of Special Causes or solely Common Causes
Process Technology
Process Standard Deviation
Shape of process data distribution (e.g. Normal Distribution)
Score 1 of 1
Question:
The purpose of a kaizen event is to:
Response:
Provide a quantitative view used to identify a focus area.
Define standard operations and eliminate NVA in a short period of time, using
the expertise of everyday users.
Create a shared view of the process.
Provide a structure for finding the causes of an effect.
Score 0 of 1
Question:
What is true for Contingency Table?
Response:
It does not give information about the relationship between variables
It is not a type of frequency distribution
Are also called Crosstabs or two way tables
All of the above
Score 1 of 1
Question:
Sort these 5S’s to the proper order of execution
Response:
Sustain
Set In Order
Shine
Standardize
Sort
Shine
Standardize
Sustain
Sort
Set In Order
Sort
Set In Order
Standardize
Sustain
Shine
Sort
Shine
Set In Order
Sustain
Standardize
Sort
Set In Order
Shine
Standardize
Sustain
Score 1 of 1
Question:
For a process working at 5 Sigma level, how many opportunities are considered to lie
outside of the specification limits (Defects) provided by the customer?
Response:
6210
3.4
66807
233
Score 1 of 1
Question:
Deviations of measured values over time from the true value is known as ________?
Response:
Repeatability
Linearity
Stability
Bias
Score 1 of 1
Question:
Cost of Poor Quality (COPQ) can be classified as Prevention Cost as one of the
categories. From these items select examples of Prevention Costs.
Response:
Time Value of Money
Training
Quality audits
Late Delivery
Score 0 of 1
Question:
In a hypothetical situation, if all part to part variation, measurement variation and
other extraneous causes of variation were removed from a process, what would be left?
Response:
Product spread
Time to time variation
Nothing it would all be eliminated.
Inherent process variation
Score 1 of 1
Question:
The _______ is used to visualize sources of variation
Response:
Histogram
Box Plot
Scatter Plot
Multi-Vari Chart
Score 1 of 1
Question:
How might you display central location on a nominal scale?
Response:
Median
Mean
None of These
Mode
Score 0 of 1
Question:
What statistic is used for sampling?
Response:
Sigma
Anova
Xbar
Mû
Score 1 of 1
Question:
Which of the following statements is not correct?
Response:
Accuracy is indicated by measures of central tendency
Precision is measured by standard deviation
Precision implies the gap between actual and target performances
Precision is an indication of variation within the process
Score 0 of 1
Question:
Identify the incorrect statement.
Response:
Parametric method uses the normality assumption
Non parametric test results are more robust against violation of assumptions
Non parametric method does not use any normality assumptions
Non parametric tests provide greater power than parametric tests with equal
sample sizes when assumptions are met
Score 1 of 1
Question:
The importance of validating a measurement system is to ensure that the measurement
does reflect the true variation of the process.
Response:
False
True
Score 1 of 1
Question:
Which of these graphical presentations displays the values of Outliers explicitly?
Response:
Stem and Leaf Plot
Histogram
Box Plot
X-Y Diagram
Score 1 of 1
Question:
What type of DOE gives the largest knowledge?
Response:
Full Factorial
Fractional Factorial
Response Surface
Score 1 of 1
Question:
During an FMEA exercise, the following values were observed for a failure mode:
Severity = 6, Occurrence = 7, Detection = 5. What is the RPN?
Response:
2100
21
35
210
Score 0 of 1
Question:
When using the estimated RTY equation the DPU has to be less than?
Response:
4%
10%
6%
8%
12%
Score 1 of 1
Question:
Control charts were developed by?
Response:
Dr. Walker A. Shewhart
Donald Wheeler
Jack Welch
Bill Smith
Score 1 of 1
Question:
The Waste of Overproduction is defined as ______________________.
Please choose the correct answer.
Response:
Producing more than the next step needs or more than the customer buys
The extra movement of material
The liability of materials that are bought, invested in and not immediately sold
or used
The unnecessary movement of people and equipment
Score 0 of 1
Question:
In a Variable Gage R&R, the acceptable % contribution of variation attributable to
Repeatability and Reproducibility should be less than _____%
Response:
10
90
30
1
Score 1 of 1
Question:
When variation is removed from the output of a process then the process customer can
have more confidence in the experience that results from the process.
Please choose the correct answer.
Response:
True
False
Score 0 of 1
Question:
Some of the sources for different types of error that can be quantified using Statistical
Analysis are which of these?
Please choose the correct answer.
Response:
Error in measurement
All of the above
Error in sampling
Bias in sampling
Score 1 of 1
Question:
__________ is how consistent measurements deliver the same values under the same
circumstances?
Response:
Precision
Non Bias
Reproducability
Distribution
Score 1 of 1
Question:
A Supplier symbol in a VSM is placed_____
Response:
Center of the VSM
Upper left corner
Bottom of VSM
Upper right corner
Score 0 of 1
Question:
The equation Y=f(X) is at the core of Six Sigma methodology. Which of these statements
is not correct?
Response:
Y is a dependent variable and X is an independent variable
Y is an independent variable and X is a dependent variable
Both Y is an independent variable and X is a dependent variable and Y should
be controlled and X should be monitored
Y should be controlled and X should be monitored
Score 1 of 1
Question:
__________ is a measure of the consistency of Bias over the range of the measurement
device.
Response:
Breadth
Range
Linearity
Bias
Score 1 of 1
Question:
The first test in the Western Electric Rules is to check whether any one point on the
control chart is more than ______ standard deviations away from the center line?
Response:
1
6
2
3
Score 1 of 1
Question:
What are the two types of data that can be used in Statistical Analysis.
Response:
Variable Data, linear data
Linear Data, inferential data
Attribute Data, variable data
Inferential Data, attribute data
Score 1 of 1
Question:
To properly analyze the variables impacting the output of a process we need to collect
data that represents at least 80% of the variation in the process and assure ourselves we
are collecting data from all three types of variation which are _______________.
Response:
Induced, Natural and Unavoidable
Within, Between and Temporal
Within, Between and Temporary
Without, Above and Below
Score 0 of 1
Question:
When the variance inflation factor of an independent variable is larger than ______
there is large multicollinearity for this variable in the model?
Response:
10
0
5
1
Score 1 of 1
Question:
The suggested hypothesis test when X is continuous and Y is discrete is:
Response:
ANOVA
F Test
None of the above
Chi-sq Test
Linear Regression
Score 0 of 1
Question:
Which of these statements is not correct with respect to roles in a Lean Six Sigma
program?
Response:
Only Roles are mutually exclusive
Roles are strictly in line with the organization hierarchy
Roles are mutually exclusive
Both Roles are mutually exclusive and Roles are strictly in line with the
organization hierarchy
Score 1 of 1
Question:
The risk prioritization number is the product of the ______ score, _____ score and
______ score?
Response:
Design, Measure, Improve
Severity, Occurrence, Detection
Mean, Median, Mode
Severity, Occurrence, Prevention
Score 1 of 1
Question:
What is the purpose of a data collection plan?
Response:
To give all team members a common reference
To provide a clear, documented strategy for collecting reliable data
To help to ensure that resources are used to collect only critical data
All of the above
Score 1 of 1
Question:
Using this partial Z Table, how many units from a month’s production run are expected
to not satisfy customer requirements for the following process?
Upper specification limit: 8.4 Lower specification limit: 4.7 Mean of the process: 6.2
Standard Deviation: 2.2 Monthly production: 360 units
Please choose the correct answer.
Response:
13
146
28
57
Score 0 of 1
Question:
The two types of data that are to be used in Statistical Analysis are Attribute and
Variance.
Please choose the correct answer.
Response:
True
False
Score 1 of 1
Question:
Linear regression sometime referred to as least squares
Response:
True
False
Score 1 of 1
Question:
5S Sorting: Items used weekly should be kept _______?
Response:
In a remote location
In a local location
Within arm's reach
In a storage area
Score 1 of 1
Question:
If a process has subgroups for Variable data and the process runs for a long period of
time, then the best pair of SPC Charts to use would be an Xbar and _________.
Please choose the correct answer.
Response:
Individuals Chart
C Chart
NP Chart
R Chart
Score 1 of 1
Question:
Production Line A is able to complete 5,000 units per hour. Production Line B is able to
finish 10,000 units per hour. Production Line B is 2 times faster than Production Line A.
This scenario is an example of __________
Response:
Nominal Scale Data
Ratio Scale Data
Ordinal Scale Data
Interval Scale Data
Score 0 of 1
Question:
Which statement(s) are incorrect about Fractional Factorial Designs?
Response:
Quarter Fractional experiments can exist for those with 4 factors
A Half Fractional Design for 5 factors has the same number of experimental
runs as a Full Factorial Design for 4 factors assuming no repeats or replicates or
Center Points
Half Fractional experiments do not exist for those designs with only 2 factors
Resolution V design is desired while controlling costs of experimentation
Score 0 of 1
Question:
An operational definition is required:
Response:
To remove ambiguity and ensure everyone has the same understanding
All of the above
To assist data collection and analysis
To provide a clear way to measure a characteristic
Score 1 of 1
Question:
We can better sustain standardized work with which of the following?
Response:
5S
Visual Factory
Kanban
Andon
Score 0 of 1
Question:
The contents of the high-level process map include:
Response:
Customer requirements, outputs, process steps, inputs, and suppliers.
None of the above.
Schedule factors, outputs, process steps, inputs, and suppliers.
Customer requirements, outputs, process steps, costs, and suppliers.
Score 0 of 1
Question:
You need to have an effective process control system because:
Response:
People outside of the Six Sigma team need to know how to manage the process.
All of the above.
Operators need to know what to do if the process gets out of control.
The process will have a tendency to degrade over time.
Score 0 of 1
Question:
With a sample size of 16, an average of 12, and a standard deviation of 3, estimate the
95% confidence interval for the population (assume a normal distribution)
Response:
10.45 < Xbar < 13.55
10.53 < Xbar < 13.20
10.76 < Xbar < 13.23
10.53 < Xbar < 13.47
Score 0 of 1
Question:
Specifically in Six Sigma, intentional changes in process performance comes from
changing and controlling:
Response:
Process outputs
Transparent variables
Process inputs
Random variables
Score 0 of 1
Question:
Select all correct responses, Hypothesis testing can help us…
Response:
Separate special cause from noise
Make fact-based decisions
Always 100% fair decisions
Make 100% risk free decisions
Score 0 of 1
Question:
Value stream analysis is used to:
Response:
Find out VA and NVA activities
All of the above
None of the above
Address moments of truth
Evaluate the flow of and the bottlenecks in the process
Score 1 of 1
Question:
Why is the following not a well written problem statement?
During 2015 the average cycle time for a Detroit factory product named “AK23” was
too slow. The goal of this project is to reduce “Ak23” cycle time.
Response:
There is timeline associated with the project goal
The metric target or goal is not identified
There is no metric baseline
The gap to goal and cost of poor quality is identified
Score 1 of 1
Question:
Logistic regression is _________ when the observed outcome of dependent variable can
have only two values such as 0 and 1 or success and failure
Response:
Binomial
Ordinal
None of the Above
Multinomial
Score 0 of 1
Question:
Which statement(s) are correct about the Factorial Plot shown here?
There are 3 correct answers to this question.
Response:
The coded coefficient is lower for cutting speed than the cutting angle related to
the output of tool age
The coefficient of the metal hardness is positively related to the output of tool
age
These plots prove a statistically significance factor with 95% confidence
These plots are an example of interaction plots
When the cutting speed increased from low to high level, the tool age increases
Score 0 of 1
Question:
If an experiment has 5 factors and no replicates for a 2-level Experimental Design with
16 experimental runs which statement is incorrect?
Response:
The Main Effects are confounded with only 4-way interactions
The Main Effects for the 5 factors are not aliased or confounded but the 2-way
interactions are confounded with the 3-way interactions
The Experimental Design is half-fractional
The experiment has 8 experimental runs with the first factor at the high level
Score 0 of 1
Question:
Which hypothesis test is used to check whether the population of our interest is normally
distributed?
Response:
Shapiro-Wilk test
Marck willson test
Jarque=Bera test
Anderson t- test
Score 1 of 1
Question:
A project to reduce the process cycle time has been initiated with an objective of
reducing personnel cost per unit. Which of these can constitute a valid saving?
Response:
Any of the above
An increase in revenue without any reduction of number of personnel
Excess personnel is reassigned somewhere else
Excess personnel removed from the process
Score 1 of 1
Question:
An intended outcome of using SPC should
Response:
Process speed
Process stability
Process implementation
Process capability
Score 1 of 1
Question:
Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that
they will sell a minimum of 22 pots per day if the outside temperature exceeds 60o F.
From a sample, whose population is assumed to follow a Normal Distribution, taken for
30 days at 60 degrees or more an average of 18.2 pots per day were sold with a Standard
Deviation of 0.9 pots.
What is the Z value for this sales process?
Please choose the correct answer.
Response:
1.62
4.22
2.11
1.23
Score 1 of 1
Question:
When a Belt decides to use written procedures and visual controls to improve the
consistency of the tasks that must occur in the process he is improving he has utilized the
_________________ activity of 5S.
Response:
Sorting
Standardizing
Sustaining
Straightening
Score 0 of 1
Question:
The Lean technique that focuses on making “important work flow issues” noticable is
called?
Response:
Kaizen
Muda
Value Stream
Visual Factory
Score 1 of 1
Question:
If a Belt needed to model the data for the number of weaves in section of carpet fabric
she would use the _____________ Distribution approach.
Please choose the correct answer.
Response:
Exponential
Extended
Weibull
Poisson
Score 1 of 1
Question:
The purpose of a Pareto chart is:
Response:
To provide a quantitative view used to identify a focus area.
To create a shared view of the process.
To provide a structure for finding the causes of an effect.
To identify ways in which a subprocess or product characteristic can fail.
Score 1 of 1
Question:
If in an experiment all possible variable pairs sum to zero the design is Orthogonal.
Response:
True
False
Score 1 of 1
Question:
Which are True for the below table
Response:
Occupation has low factor loading with factor 2
Income has high factor loading with Factor 1
House Value has high factor loading with factor 2
All of the Above
Score 0 of 1
Question:
Analysis of Variance (ANOVA) is used to investigate and model which of these?
Response:
All of the above
ANOVA helps in controlling the errors which otherwise tend to increase while
using multiple T-tests
The variance associated with a single set of variables
The relationship between a response variable and one or more independent
variables
Score 1 of 1
Question:
________ is a continuous probability distribution which arises in the analysis of variance
or test of equality between two variances?
Response:
Z Distribution
Z-test
Normal Distribution
F Distribution
Score 0 of 1
Question:
When it comes to Control, one of the most effective means of eliminating defects is to…
Response:
Train personnel often and thoroughly
Keep a Six Sigma project going on the process at all times
Design defect prevention into the product or process
Have each process consist of no more than five steps
Score 1 of 1
Question:
In every factor analysis, there are the same number of factors as there are variables.
Response:
True
False
Score 1 of 1
Question:
A Lean Six Sigma team has been assigned the task of improving an existing process.
Which of the following tools should the team use to gain a clear understanding of the
current process?
Response:
Process FMEA
Flow chart
Pareto chart
Design of experiments
Score 1 of 1
Question:
Which tool is used to compare more than two sample proportions with each other?
Response:
Contingency Tables
2 sample T-test
Moods Median
Mann-Whitney
Score 0 of 1
Question:
_________ is a situation wherein the input variables are strongly correlated
Response:
Pairing
Multicollinearity
All of the above
Interactions
Score 1 of 1
Question:
Upper and lower control limits in control charts are commonly based on how many
standard deviations?
Response:
4
2
1
3
Score 1 of 1
Question:
In a VSM, Suppliers and customers share the same symbol that looks like an abstract,
geometric representation of a factory. Supplier is shown in the top left side and the
customer in top right side of the VSM.
Response:
True
False
Score 1 of 1
Question:
The reported Cpk for a process with an average of 98 units, a spread of 16 units and
upper and lower specification limits of 115 and 90 units would be?
Please choose the correct answer.
Response:
0.75
1.00
0.5
1.25
Score 1 of 1
Question:
A Belt working in a supply chain environment has to make a decision to change
suppliers of critical raw materials for a new product upgrade.
The purchasing manager is depending on the Belt’s effort requiring that the average
cost of an internal critical raw material component be less than or equal to $4,200 in
order to stay within budget.
Using a sample of 35 first article components, a Mean of the new product upgrade price
of $4,060, and a Standard Deviation of $98 was estimated.
In order to increase the Long Term Z value to 4, what is the maximum long term
variation in pricing the Belt can accept for his upgraded critical raw material
component?
Please choose the correct answer.
Response:
$35
$20
$110
$70
Score 1 of 1
Question:
When conducting a Hypothesis Test using Continuous Data the proper sample size is
influenced only by the extent to which we need to assess a Difference to be detected but
not the inherent variation in the process.
Please choose the correct answer.
Response:
False
True
Score 1 of 1
Question:
Training cost is $5,000 and a project required an initial investment of $10,000. If the
project yields monthly savings of $1,500 beginning after 2 months, what is the payback
period in months (before money costs and taxes)
Response:
12
14
8
18
Score 1 of 1
Question:
Since Normality is required if we intend to use the data collected as a predictive tool. To
test for Normality of data we must determine if the P-value is ___________.
Please choose the correct answer.
Response:
Greater than 0.5
Equal to 0.05
Less than 0.05
Greater than 0.05
Score 0 of 1
(skipped)
Question:
Stratification is defined as ___
Response:
Tendency for the points to cluster artificially around the center line
Shift in the process level
Continuous movement of points in one direction
When the points fall near or slightly outside the control limits
Score 1 of 1
Question:
What is an operational definition?
Response:
All answers are correct
Used for FMEA
Describes the scope of the measure
A precise and detailed description of the specific criteria used to define
something
MSA
Score 1 of 1
Question:
The purpose of a failure modes and effects analysis (FMEA) is:
Response:
To provide a quantitative view used to identify a focus area.
To create a shared view of the process.
To identify ways in which a subprocess or product characteristic can fail.
To relate the customer CTQs to measurable subprocesses or product
characteristics.
Score 1 of 1
Question:
Which statement is most correct for the Regression Analysis shown here?
Please choose the correct answer.
Response:
This Simple Linear Regression explains 98+% of the process variation
This Multiple Linear Regression has four statistically significant independent
variables
The Regression explains 50.8% of the process variation
The air-fuel ratio explains most of the TurbineOutput variation
Score 1 of 1
Question:
In a SIPOC, inputs can be:
Response:
Output from other processes
Data
All the above
Suppliers' products
Score 1 of 1
Question:
In a SIPOC, a customer is someone:
Response:
Most critical part
Who receives an output
End user of a process
Key stakeholder of the process
Score 1 of 1
Question:
What is Kano Model used for?
Response:
To identify root cause
Design a process
To analyze customer requirements
All of the above
Score 0 of 1
Question:
Having Unequal Variance could be due to similar distributions having which of these?
Response:
Outliers
Multiple Modes
All of the above
Extreme tails
Score 1 of 1
Question:
A researcher carefully computes the correlation coefficient between two variables and
gets r = 1.23. What does this value mean?
Response:
Strong Positive Correlation
Positive Correlation
Error
Weak Correlation
Score 1 of 1
Question:
Which of the following approaches is used to determine differences between population
sets?
Response:
Optimization design of experiments
Hypothesis test
Screening design of experiments
Process capability analysis
Score 0 of 1
Question:
Ppk tells you how the process has performed in the past. You cannot use it predict the
future, like with Cpk,
Response:
False
True
Score 0 of 1
Question:
If a project yields monthly savings of $4,000 beginning 4 months after implementation
with an initial investment of $42,000 and training costs of $2,000, what is the 5 year ROI
from implementation?
Response:
5.45
5.09
4.45
4.09
Score 1 of 1
Question:
Which of these is not a primary cause for Non-normal Data?
Please choose the correct answer.
Response:
Mixed Distributions
Kurtosis
Formulosis
Granularity
Skewness
Score 1 of 1
Question:
Appropriate measures means that measurements are ______________.
Please choose the correct answer.
Response:
All of these answers are correct
Relevant
Representative
Sufficient
Contextual
Score 0 of 1
Question:
What isn’t interquartile range?
Response:
The value that exceeds at least 75% of the data set
The difference between the 50th percentile point and the 25th percentile point
measure of the middle 50% of the data set
The difference between the 75th percentile point and the 25th percentile point
Score 0 of 1
Question:
Which test should be used to compare the average results of 7 different Green Belt
classes?
Response:
ANOVA
2 Proportions test
Chi Square test
1 sample t-test
F-test or Levene
2 sample t-test
Score 1 of 1
Question:
Which one of the listed tools is frequently used to help drill down to possible causes once
a Fishbone Diagram is constructed?
Please choose the correct answer.
Response:
Ishikawa Diagram
Skeleton Diagnostic
5 Why Analysis
3 When Analysis
Score 1 of 1
Question:
What is the intended type of use for the FMEA
Response:
Proactive process evaluation and mitigation
Control process evaluation and mitigation
Reactive process evaluation and mitigation
Lifecycle process evaluation and mitigation
Score 1 of 1
Question:
If we produce more than is needed by the next step in the process or more than the
customer needs this is an example of which element of waste?
Response:
Overproduction
Overprocessing
Correction (defects)
Motion
Speed
Score 1 of 1
Question:
Which of the following is TRUE about Type I and Type II errors?
Response:
You can eliminate the possibility of a Type II error but not a Type I error
A Type I error is incorrectly rejecting the Null Hypothesis (HO) while Type II
error is failing to reject the Null Hypothesis (HO) when you should
A Type II error is at least 2x larger than a Type I error
A Type I error deals with input variables (Xs) and a Type II error deals with
output variables (Ys)
Score 1 of 1
Question:
Which tool has as its objective as the identification of various potential causes or factors
influencing a process output?
Response:
Fishbone Diagram
Pareto Chart
FMEA
Impact Study
Score 1 of 1
Question:
The Mode is the ________
Response:
Mid point of the data set
The total value of a data set divided by the total number of data points
Least frequently occurring value in a distribution of data
Most frequently occurring value in the data set
Score 1 of 1
Question:
Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that
they will sell a minimum of 15 pots per day if the outside temperature exceeds 60o F.
From a sample, whose population is assumed to follow a Normal Distribution, taken for
30 days at 60 degrees or more an average of 13.6 pots per day were sold with a Standard
Deviation of 0.7 pots.
The statistical Degrees of Freedom for this example are?
Response:
31
1
30
2
29
Score 1 of 1
Question:
What is a Y measure?
Response:
Variance
Output
Input
Process
Score 1 of 1
Question:
A P-chart might be used to display the rate of defectives for this type of capability
analysis?
Response:
Attribute
Continuous
Stability
Poisson
Score 1 of 1
Question:
A department has a hypothesis that its sales average is $17,200 per month. A sample
report of 11 months shows a mean of $16,221. The standard deviation is $3,996. Using
an alpha level of 5% and degrees of freedom (DF), what is the critical-T value for a 2
sided test as required in this case:
Response:
2.262
6.314
2.228
1.833
Score 0 of 1
Question:
What is True for Coefficient of Determination?
Response:
Is denoted by R2 and It is interpreted as the proportion of the variance in the
dependent variable that is predictable from the independent variable.
Lower the R2, better the model is
It is interpreted as the proportion of the variance in the dependent variable that
is predictable from the independent variable.
Is denoted by R2
Score 0 of 1
Question:
Series of connected flow in a value stream is
Response:
Loop
Link
Group
Function
Score 1 of 1
Question:
Which of the following could cause process variability?
Response:
Set up Procedures
Environmental effects
All answers are correct
Process tool settings
Score 1 of 1
Question:
The _______ is the most frequently occurring value in a distribution of data.
Response:
Mean
Median
Mode
Center Point
Score 1 of 1
Question:
The last output of the control phase is the?
Response:
Analysis Plan
Control Plan
Final report
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