A humane society claims that less than 31% of U.S. households own a dog. In a random sample of 392 U.S. households, 155 say they own a dog. At a=0.03, is there enough evidence to support the society's claim?
A. Write the claim mathematically and identify Ho and Ha
B). Find the critical value and identify the rejection region
C. Find the standardized test statistic.
D. decide whether to reject or fail to reject the null hypothesis
E. interpret the decision in the context of the original claim.