1. Are You Ready? Unit 5 Review

2. Question 1 What is a measure of center? Mean Median Mode
All of the above
None of the above

3. Question 2 What does a measure of center tell us about a set of data?
How spread out the data is
Where the middle of the data is
If the mean tells the true story of the data
The interquartile range

4. Question 3 Which of the following are measures of spread? Range IQR
Both A and B
None of the above

5. Question 4 What does a measure of spread tell us about a set of data?
The amount of variability in the data
The amount of consistency in the data
If there are any outliers
All of the above
None of the above

6. Quiz Scores for Cooper Middle:
Question 5
What is the mean, median, and mode for the following quiz scores:
16, 16.5, 18
16, 16, 16 and 18
16.5, 17, 6
Quiz Scores for Cooper Middle: 18 17 14 16 20 15 6

7. Question 6
Looking at the data for Cooper Middle School, is there an outlier?
Yes No

8. Question 7 How does an outlier impact the mean?
It doesn’t impact it at all, so the numbers accurately portray the data.
It causes the mean to be lower or higher only.
It causes the mean to be either higher or lower and gives an inaccurate picture of the data.
None of the above.

9. Question 8
If a box plot was being made for Cooper Middle School’s quiz scores, what number would represent Quartile 1? 16
16.5 15
15.5

10. Question 9
The range in the Cooper Middle School data is 14 and the Tapp Middle School range is 11. Based on this number, which school had the greatest variability of scores?
Cooper
Tapp

11. Quiz Scores for Tapp Middle:
Question 10
What is the mean, median, and mode for Tapp Middle School?
14, 14, 15
14, 15, 13
1.8, 14, 14
14, 15, 15
Quiz Scores for Tapp Middle: 20 14 16 15 11 13 9 12

12. Question 11
Based on the data, do you think that 9 should be considered an outlier for Tapp Middle School?
Yes No

13. Question 12 What is the interquartile range for Tapp Middle School? 143 27 15

14. Question 13
In a poll of Mrs. Preyer’s 8th grade science class, 62.5% of the students say that science is their favorite academic subject. The editor of the LMS yearbook is in her class, and she wants to write an article for the yearbook saying that science is the most popular subject at the school. What type of sampling method was used to obtain the data for the yearbook article?
Random sampling
Self-selected sampling
Convenience sampling
Stratified random sampling

15. Question 14 Did the editor did not make a valid or biased conclusion?

16. Question 15
Which of the following sampling method would have worked better to gather data for determining what subject is most popular?
No need to change
Self-selected within the classroom
Stratified random
Systematic in the cafeteria during breakfast

17. Question 16
Averi conducted a survey of customers at the shoe store to determine the most popular brand of shoe. Of the 103 people she surveyed, 20 liked ASICS, 9 liked Adidas, 22 liked New Balance, 34 liked Nike, and 18 liked Reebok. What is the size of the sample? 20 18
103 94

18. Question 19 Given the following data sets, which set has the
greatest interquartile range?
Set 1
Set 2
Set 3
Set 4
Minimum 25 15 20 40 Q1 30 50
Median (Q2) 45 65 Q3 60 95
Maximum 70 80 75
100 A.
Set 1 B.
Set 2 C.
Set 3 D.
Set 4

19. Question 20
Caleb asked every fourth customer at two different gyms to name the number of hours per week they exercised. Which sampling method was used?
Convenience
Self-Selected
Random
Stratified Random
Systematic

20. Question 21
Callie is taking a survey to find out the most popular radio station in her community. Which of these is NOT a way for her to get a representative sample of this information? A.
Ask every tenth person at a music concert. B.
Ask every fifth person entering the grocery store. C.
Ask every third person at a local restaurant. D.
Ask every seventh person at a movie theater.

21. Question 22 What is the interquartile range for the box plot below? A.5 B. 15 C. 20 D. 30

22. Question 23 What is statement below is NOT true? A.
The median price at Electronics World is $10 more than at Bargain Basement. B.
The interquartile range is the same for both stores. C.
The range for Bargain Basement is wider than Electronics World. D.
MP3 players are more expensive at Electronics World.

23. Question 24
A survey found that 90% of people use emojis when they are instant messenging. Predict how many of the 1,450 students at Washington Middle School do not use emojis. A.
100 B.
145 C.
1305 D.
1405

24. Question 25
A survey of high school students with jobs asked whether the students saved some of the money they earned. 18 out of 30 students said they saved some money. Out of 350 students, predict how many would save some of their earnings. A. 12 B.
140 C. 40 D.
210

25. Question 26
About 240,000 teens ages live in Missouri. Predict the number of teens in this age group who volunteer once a year. A.
7,200 B.
21,600 C.
26,400 D.
72,000

26. Question 27 Find the interquartile range for Kareem. A. 1 B. 2 C. 4 D.
3.5

27. Question 28 Find the interquartile range for Martin. A. 1 B. 2 C. 3.54

28. Answer Key D A C
19 D B
20 E A B
23 C D
26 A
27 B
28 D