NAME ____________________________________ DATE ____________________PERIOD ______Samples & Populations: Problem 2.3 – Choosing Random Samples

You are going to choose a sample and represent your sample with a line plot and a box plot. To make it easier to compare your sample’s distribution with others, your class should decide on a scale before starting.

A.1. Use spinners, 10-sided number cubes, a graphing calculator, or some other method to select a random sample of 30 students (your sample should contain 30 different students. If you select a student who is already in your sample, select another).

A. 2. For each student in your sample, record the number of movies watched and the number of hours slept.

B.1. Make a line plot showing the distribution of the movie data from your sample.

# of Movies

Watched

# of Hours Slept

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

# of Movies

Watched

# of Hours Slept

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

B.2. Describe the variability in the number of movies watched by students in your sample.

B.3. Compare your distribution with those of other members of your class. Describe any similarities or differences.

Similarities -

Differences -

B.4. What can you conclude about the movie watching behavior of the population of 100 students based on all the samples?

C.1. Make a box plot showing the distributions of the hours of sleep for the students in you sample.

Minimum value =

Maximum Value =

Median =

Lower Quartile =

Upper Quartile =

C.2. Describe the variability in the number of hours of sleep for students in your sample.

C.3. Compare your distribution with those of other members of your class. Describe any similarities or differences.

Similarities -

Differences -

C.4. What can you conclude about the hours of sleep of the population of 100 students based on all the samples selected by members of your class? Explain.