weeeeeeeeeeeeeeeeeeeeeeeeeeeow-
____ refers to a collection of observations
data
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_________ is the science of conducting studies and experiments to collect, organize, analyze, and draw conclusions from data
statistics
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_________ _________ are a way to organize and summarize data
descriptive statistics
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__________ __________ uses probability to determine how confident we are that our conclusions are correct
inferential statistics
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A ___________ consists of all subjects that are being studied; it is a complete collection
population
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A ____________ is a group of subjects selected from the population
sample
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__________ is a technique used where a portion of the population is selected and studied to gain information about the population
sampling
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a ________ is a numerical measurement describing a characteristic of a population
parameter
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a _________ is a numerical measurement describing a characteristic of a sample
statistic
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A ________ is a characteristic of measurement that can be determined for each member of the population
variable
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a number or variables that take on values that are indicated by numbers is a _______ ________
numerical variable
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a category or variables that take on values that are names or labels is a _________ _________
categorical variable
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___________ _______Consists of numbers representing counts or measurements which can be ranked or ordered (numerical) it includes ______ ____ and ______ _______
quantitative data
discrete data
continuous data
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______ ______ is a form of quantitative data that assumes values that can be counted, whole numbers
discrete data
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___________ ________ is a form of quantitative data that assume values that can be fractions or decimals and come from measurements
continuous data
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___________ _______ consists of names or labels that are not numbers representing counts or measurements
qualitative data
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a _______ _______ is a sample where members of the population are selected in such a way that each individual has the same chance of being selected
random sample
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a ______ ________ ________ is a sample where members of the population are selected in such a way that each sample of size n has the same chance of being selected
simple random sample
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a _____ _____ consists of a horizontal scale representing the data in which data values are plotted as a point or dot along the horizontal scale
dot plot
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a ____ _____Represents quantitative data by separating each value into two parts, for example if you have 10, 12, 13 the left side would be in the ______ place and the right side would be in the ____ places
stem plot
tenths
ones
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number of times per week is what type of data?
quantitative discrete data
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duration is what type of data?
quantitative continuous data
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the colors of the houses around the park are what kind of data?
qualitative data
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Symmetric data
Distribution where the mean, median, and mode are all the same down the middle in the bars of the histogram
normal distribution
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Symmetric data
A symmetric distribution in which all bars in the histogram occur approximately with the same height
uniform distribution
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Skewness
Data skewed to the left is ________ skewed and occurs when the _____ and ____ is to the left or less than of the _____
negatively
mean
median
mode
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Skewness
Data is skewed to the right is _______ skewed and the ____ and _____ are to the right or greater than the _____
positively
mean
median
mode
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Mean = 75.4
Median = 72
Mode = 68 and 72
what is the skewness?
positive skew
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Mean = 48
Median = 51
Mode = 53
what is the skewness?
negative skew
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max - min = ______
range
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when z > 2, the data value is __________
unusually high
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when z < -2, the data value is _________
unusually low
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when -2 ≤ z ≤ 2 the data value is ________
usual
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ẋ - 2s is the ___________
min usual value
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ẋ + 2s is the ___________
max usual value
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The empirical rule
About _____ of the data fall within one standard deviation of the mean
68%
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The empirical rule
About ____ of the data within two standard deviations of the mean
95%
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The empirical rule
About _____ of the data within three standard deviations of the mean
99.7%
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a _______ is a complete count of a population or group at a specific time, with respect to defined characteristics
census
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number of competing computer spreadsheet software packages is a form of
quantitative discrete data
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age of executives in Fortune 500 companies is a form of
quantitative continuous data
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distance to the closest movie theatre is a form of
quantitative continuous data
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most-watched television show is a form of
qualitative data
