2) The accompanying table shows the weights, in pounds ...



Name: _________________________________ Date: ______________________ Statistics Test Review

1) Below are the prices of snowboards at two competing snowboard stores:

Middletown Snowboards Snowboard Central

345, 350, 356, 360, 375, 405 343, 370, 386, 392, 395, 402

Median: __________

Lower Quartile: ____________

Upper Quartile: _____________

Interquartile Range: ______________

Median: __________

Lower Quartile: ____________

Upper Quartile: _____________

Interquartile Range: ______________

Create a box and whisker graph for each store on the same plot below:

[pic]

2) The accompanying box-and-whisker plot represents the cost, in dollars, of twelve CD’s.

[pic]

a) Which cost is the upper quartile?

b) What is the range of the costs of the CD’s?

c) What is the median?

d) What is the interquartile range of the cost?

e) How many CD’s cost between $14.50 and $26.00?

f) How many CD’s cost less than $14.50?

3) The accompanying box-and-whisker plot represents the scores earned on a math test.

a) What is the median score?

(1) 75 (2) 70 (3) 85 (4) 77

b) What score represents the first quartile?

(1) 55 (2) 70 (3) 100 (4) 75

C) What statement is not true about the box and whisker plot shown?

(1) 75 represents the mean score

(3) 85 represents the 3rd quartile

(2) 100 represents the maximum score

(4) 55 represents the minimum score

D) A score of an 85 on the box-and-whisker plot shown refers to:

(1) the third quartile (3) the maximum score

(2) the median (4) the mean

4. 15 out of 20 teens said they eat breakfast every morning. What is a reasonable prediction for the number of teens out of 1,000 who eat breakfast every morning?

5. A survey showed that 70% of students would select roller coasters as their favorite ride at an amusement park. Out of 5,000 students, predict how many would select roller coasters as their favorite ride?

6. A survey found that 3 out of 7 people in a community jog on a regular basis. If there are 3,150 people in the community, what is a reasonable prediction for the number of people who would jog regularly?

7. Feticia wanted to find out which hip hop video was most popular among the junior high school students. Where should she conduct her survey to get the most unbiased survey?

a. At a teacher’s meeting

b. In the jazz class

c. In the band hall where hip-hop music is not allowed

d. At a school dance

8. Earl wanted to find out which sport was most popular among high school students. Where should he conduct his survey to get the most unbiased survey?

a. At a game for sport A

b. At the tryouts for sport B

c. At a chess club meeting

d. At physical education sign-ups

9. The box given shows Lakeisha’s scores of five math quizzes.

100, 89, 84, 72, 95

What is the relationship between Lakeishea’s mean and median quiz score?

a. The mean is one point lower than the median c. The mean is one point higher than the median

b. The mean is four points lower than the median d. The mean is four points higher than the median

10. Here are the times (in minutes) that six students to finish a quiz: 10, 14, 15, 15, 14, 10. Find the mean deviation for this data.

11. The number of phone calls received by the complaint department of a small company over a five day period is as follows: 28, 26, 33, 41, 47 Find the mean deviation for this data

12. Josh’s test scores were 95, 89, 87, 95, 86, and 88. Which measure of center will give Josh the highest final grade?

A. Mean B. median C. mode D. All three are the same

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