Question

Hypothesis Testing Using Rejection Regions. In Exercises 7–12, (a) identify the claim and state H0 and Ha, (b) find the critical value(s) and identify the rejection region(s), (c) find the standardized test statistic z, (d) decide whether to reject or fail to reject the null hypothesis and (e) interpret the decision in the context of the original claim.

7. Vaccination Requirement A medical researcher says that less than 80% of U.S. adults think that healthy children should be required to be vaccinated. In a random sample of 200 U.S. adults, 82% think that healthy children should be required to be vaccinated. At a = 0.05, is there enough evidence to support the researcher’s claim?

Answer 1