State the null hypothesis, Ho, and the alternative hypothesis. Ha, in terms of the appropriate parameter (mean or prop) 1. The mean number of years Americans work before retiring is 34. 2. At most 60% 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. Twenty-nine percent of high school seniors get drunk each month. 5. Fewer than 5% of adults ride the bus to work in Los Angeles. 6. The mean number of cars a person owns in her lifetime is not more than ten. 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% for women. 10. Private universities' mean tuition cost is more than $20,000 per year