1. Getting angry at other drivers. Refer to Exercise 8.14. The same Pew Poll found that 38% of the respondents "shouted, cursed or made gestures to other drivers" in the last year.

(a) Construct a 95% con?dence interval for the true proportion of U.S. drivers who did these actions in the last year.

(b) Does the fact that the respondent is self- reporting these actions affect the way that you interpret the results? Write a short paragraph explaining your answer.

2. Cheating during a test. A  national  survey of high school students conducted by the Josephson Institute of Ethics was sent to 37,328 students, and 24,142 were returned. One question asked students if they had cheated during a test in the last school year.14 Of those who returned the survey, 9054 responded that they had cheated at least two times in the last year.

(a) What is the sample proportion of respondents who cheated at least twice?