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Pre-Test Algebra Module 2A
1. Consider the following sets of data.
Set A
Set B
Set C
Mark the appropriate box for each data set above in the table.
Data Set
Mean and median are
Mean and median are
approximately equal not approximately equal
A
B
C
2. Given the histogram shown, which of the following conclusions could be drawn from the data
shown in the histogram below?
a) People are never older than 90.
b) One-half of the patients were between 20 and 40
years of age.
c) Patients recover faster if they drink a lot of water.
d) There were three times as many patients between 40
and 50 years old as there were between 70 and 80
years old.
Rev 4/15/2015
1
Module 2A PreTest
3. James collected information about how many pounds of honey were collected from several
different bee hives. He lost all of his data, but he did remember that he collected information
from 80 different bee hives.
Fill in the correct response to each question below using the responses provided in the box.
Each response may be used more than once; some may not be used at all. (7 pts)
0
52
60
20
56
90
40
63
120
80
77
Cannot be determined
a) How many bee hives had less than 56 pounds of honey?
b) How many bee hives had more than 63 pounds of honey?
c) How many bee hives had exactly 60 pounds of honey?
d) What was the maximum pounds of honey for a bee hive?
e) How many bee hives had 50 pounds of honey?
f) What is the mean of the data set?
g) What is the median of the data set?
Rev 2/9/16
2
Module 2, Assessment 1
4. Consider the data presented in the box plots.
Which of the following statements best
describes the data and its appropriate
measure of center?
A. All three data sets are skewed, so mean is the most appropriate measure of center.
B. All three data sets are skewed, so median is the most appropriate measure of center.
C. All three data sets are symmetric, so mean is the most appropriate measure of center.
D. All three data sets are symmetric, so median is the most appropriate measure of center.
5. Each of the plots below represents the distribution of hours of television watched in a week.
Set A
Set B
Set C
What is the typical number of hours watched in each data set? (4 pts)
Data Set
Typical hours
studied
Rev 2/9/16
A
B
3
C
D
Module 2, Assessment 1
6. The school nurse surveyed a group of 20 sophomores in high school on the average number of
hours they slept each night. The results of the survey are indicated below:
9.3, 6, 6.25, 6, 9.5, 7, 6.75, 6, 9, 7.3, 10.1, 8.25, 7.1, 7, 8, 7, 8.2, 9, 9.2, 10
Make a histogram of the data in the space below. Be sure to label your axes! (3 pts)
5
4
3
2
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
7. A group of students were asked how many pets they had. The results are in the dot plots below:
Class A
Class B
Jack thinks that students in Class A have more pets. Suzanne thinks students in class B has more
pets. What measure of center should each of them use to support their opinion? (2 pts)
Jack should use:
because:
Suzanne should use:
because:
Rev 2/9/16
4
Module 2, Assessment 1
8. The students in a biology class recorded the number of letters in their first name. The data are
shown below.
Number of letters in name - Day 1
3
4
5
6
7
8
9
10
11
However, Jossilynrae was absent on the day the number of letters in their first name was
recorded and had to add her data to the set the next day.
Put a check mark in the correct box to show whether the value of each statistic, for the number
of letters in their first name, is greater for Day 1, equal for both, or greater on Day 2, based on
the box plots.
Greater on Day 1 Equal for both days Greater on Day 2
Mean
Median
Standard Deviation
9. Sarah is tracking the hours she spends riding her horse each day for two weeks. The results
are:
Hours spent riding:
1, 2, 0, 8, 2, 1, 3, 2, 2, 4, 1, 0, 3, 1
a) Is there a potential outlier for this data set?
b) Write an expression that would be used to decide whether your answer for 9a is an outlier
for this data set.
c) Use the expression to decide whether your answer for 9a is an outlier for the set.
Rev 2/9/16
5
Module 2, Assessment 1
10. 20 students were asked how many classes they passed first semester. Place 20 dots onto the
dot plot scale below so that the standard deviation of the data is as large as possible.
0
1
2
3
4
5
6
Number of classes passed first semester
11. A group of students were comparing their cumulative GPA. The results were:
Group A:
3.0, 3.1, 3.8, 3.5, 3.6
A different group of students were comparing their test scores, too. Their results were:
Group B:
2.0, 2.8, 4.0, 3.1, 3.9
Select all of the correct descriptions of the data set from the choices below:
A. The standard deviation of Group B is larger than the standard deviation of Group A.
B. The interquartile range of Group B is larger than the standard deviation of Group A.
C. The mean of Group B is larger than the mean of Group A.
D. The median of Group B is larger than the median of Group A
12. A group of high school students were asked how many years they had lived in Washington.
The results were:
4, 5, 10, 5, 6, 2, 16, 15, 13, 12, 7, 15, 16, 15
Make a dot plot that correctly shows this data.
Rev 2/9/16
6
Module 2, Assessment 1
13. The dot plot below shows the number of video games owned by each of 12 people surveyed.
0
1
2
3
4
# of video games owned
5
6
Fill in the table below by calculating the correct numeric value: (4 pts)
Mean
Standard deviation
Median
IQR
Rev 2/9/16
7
Module 2, Assessment 1