Question

1. According to US national data on births, 9.9% of births were preterm, where pregnancy lasted less than 37 weeks. The Payne County government would like to know if Payne County’s rate is significantly different than the national average. From a random sample of 187 Payne County recent birth records, the government finds that 15 births were preterm. At the α = 0.02 level, is the Payne County proportion of preterm births significantly different from the national average?

A. [3 points] What are the null and alternative hypotheses? H0: H1:
B. [4] Compute the test statistic.

C. [3] Compute the p-value. [If you didn’t find a test value, use –0.90.]

D. [3] Make a decision and briefly explain why you made that decision.

Answer 1