Question

For the general population males 6 feet tall weigh an average of 184 pounds. A​ researcher’s claim is that men in an​ anti-smoking program will gain weight. To test this claim a sample of 6 feet tall men who are in the program are to be selected. Assume the mean weight of 6 feet tall men in this program is actually 194​ pounds, σ​ = 18​ pounds, and that the data are normally distributed. The study will test significance at the 0.01 level. How large a sample would be required so that the associated test had​ 86% power?

Answer 1

As given in the problem statement

Height=6 ft

average=184 pounds

sigma=18 pounds

significance level=0.01

Confidence level=99.99

percentage=86%

To give all the data we need a sample size of n=100