Refer to Exercises 27 and 29.

a. Verify that the conditions for inference are met.

b. Use Table C to find the P-value. Then use your calculator’s χ² cdf command.

c. Interpret the P-value from the calculator.

d. What conclusion would you draw using α = 0.01?

Exercises 27 and 29.

Inspired by the example about how background music influences choice of entrée at a restaurant, a statistics student decided to investigate other ways to influence a person’s behavior. Using 60 volunteers, she randomly assigned 20 volunteers to get a “red” survey, 20 volunteers to get a “blue” survey, and 20 volunteers to get a control survey. The first three questions on each survey were the same, but the fourth and fifth questions were different. For example, the fourth question on the “red” survey was “When you think of the color red, what do you think about?” On the blue survey, the question replaced red with blue. On the control survey, the last two questions were not about color. As a reward, each volunteer was allowed to choose a chocolate candy in a red wrapper or a chocolate candy in a blue wrapper. Here are segmented bar graphs showing the results of the experiment. Describe what you see.

Table C

Transcribed Image Text:

100 Red candy 80 Blue candy 60 40 20 Red Blue Control survey Survey survey Type of survey Percent