7th Grade Math Module 10.2 Review
Multiple Choice
Identify the choice that best completes the statement or
answers the question.
1. A factory produces 42,000 computer monitors
per day. The manager of the factory claims that
fewer than 660 defective computer monitors are
produced each day. In a random sample of 240
computer monitors, there are 2 defective
computer monitors. Determine whether the
manager’s claim is likely to be true. Explain.
a. Yes, the manager’s claim is likely to be
true. Based on the data, you can predict that
there are 350 defective computer monitors
produced per day.
b. No, the manager’s claim is not likely to be
true. Based on the data, you can predict that
there are 670 defective computer monitors
produced per day.
c. Yes, the manager’s claim is likely to be
true. Based on the data, you can predict that
there are 355 defective computer monitors
produced per day.
d. No, the manager’s claim is not likely to be
true. Based on the data, you can predict that
there are 665 defective computer monitors
produced per day.
2. A newspaper is surveying voters from Idaho
regarding voting issues. Identify the appropriate
population.
a. people living in the state of Idaho
b. voters living in Boise, the capital of Idaho
c. people of voting age in the U.S.
d. voters living in the state of Idaho
3. Which of the following best describes a random
sample?
a. Each member of the population has an equal
chance of being chosen.
b. Each member of the sample has an equal
chance of being chosen.
c. Randomly select the twenty-first person in
the population, then every tenth person.
d. Randomly select a person, then choose the
next 25.
Name
4. The Springfield School band has 300
sweatshirts to sell at a fund-raiser. A survey
shows that 2 out of 7 students in the school
would purchase a sweatshirt. If there are 910
students in the school, predict how many
students would buy a sweatshirt. Will the
band probably sell all the sweatshirts?
a. about 260; No
b. about 340; Yes
c. about 280; No
d. about 320; Yes
Short Answer
5. The manager of a book store surveys people
who buy mystery novels to see if the store
should expand its hours of operation. Identify
the population and sample.
6. Middletown Middle School has 680 students.
Teresa surveys a random sample of 40
students and finds that 12 of them participate
in sports. How many students at the school
are likely to participate in sports?
7. A college football stadium holds 45,000 fans.
In a random sample of 30 fans, 26 were
wearing the colors of the home team. Predict
the number of fans who are wearing the
colors of the home team.
8. A student surveys mathematics teachers to
get their opinion on teaching. Identify the
population and sample.
9. Marion Middle School has 600 students.
Mike surveys a random sample of 30 students
and finds that 7 of them play a musical
instrument. How many students at the school
are likely to play a musical instrument?
10. You take a survey in your school about favorite
sports. The circle graph shows the percent of
students who favored each sport. 75 students
said that swimming was their favorite.
For the next two problems. Use the bar
graph that shows the survey results for
students' favorite types of books to read .
How many students were surveyed?
11. How many students chose science fiction as
their favorite type of book?
12. Estimate the total number of students who
chose sports books and history books.
Essay
13-20. A group of friends collects and trades baseball cards. They decided to analyze the number of cards
they each own.
13. Part A: How many friends’ baseball card collections were recorded?
14., 15., & 16. Part B: Find the mean, median, and mode of baseball cards.
17. Part C: Which measure of central tendency would best represent the average number of baseball
cards each friend has? Explain your reasoning.
18. Part D: Use the data to make a box-and-whisker plot.
0
50
100
150
200
250
300
350
400
450
19. and 20. Part E: What is the range and the interquartile range of the data?
500
550
7th Grade Math Module 10.2
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
A
D
A
A
SHORT ANSWER
5.
Population
All book store customers
6. 204
7. 39,000
8.
Population
All teachers
9. 140 students
10. 500
11. about 24 students
12. about 12 students
Sample
Book store customers who buy mystery novels
Sample
Mathematics teachers
ESSAY
13. Part A: 11 friends
Part B: mean is about 120.5; median
; mode
Part C: median because the mean is higher than all except for one friend who has a much larger number of
baseball cards
Part D:
Part E: range
; interquartile range