Null and Alternative Hypotheses · Exercise 11
Some of the following statements refer to the null hypothesis, some to the alternate hypothesis.
State the null hypothesis, H_0, and the alternative hypothesis. H_a, in terms of the appropriate parameter (μ or p).
(a) The mean number of years Americans work before retiring is 34.
(b) At most 60% of Americans vote in presidential elections.
(c) The mean starting salary for San Jose State University graduates is at least $100,000 per year.
(d) Twenty-nine percent of high school seniors get drunk each month.
(e) Fewer than 5% of adults ride the bus to work in Los Angeles.
(f) The mean number of cars a person owns in her lifetime is not more than ten.
(g) About half of Americans prefer to live away from cities, given the choice.
(h) Europeans have a mean paid vacation each year of six weeks.
(i) The chance of developing breast cancer is under 11% for females.
(j) Private universities' mean tuition cost is more than $20,000 per year.
OpenStax, Introductory Statistics 2e · §9.1 Null and Alternative Hypotheses · Exercise 11
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