9.2 Exercise 15

State the Type I and Type II errors in complete sentences given the following statements.

1. The mean number of years Americans work before retiring is 34.
2. At most 60 percent of Americans vote in presidential elections.
3. The mean starting salary for San Jose State University graduates is at least $100,000 per year.
4. 29 percent of high school students take physical education every day.
5. Less than 5 percent of adults ride the bus to work in Los Angeles.
6. The mean number of cars a person owns in his or her lifetime is not more than 10.
7. About half of Americans prefer to live away from cities, given the choice.
8. Europeans have a mean paid vacation each year of six weeks.
9. The chance of developing breast cancer is under 11 percent for women.
10. Private universitie' mean tuition cost is more than $20,000 per year.