Consider a Situation in Which You Are Interested in Whether

Multiple Choice

Consider a situation in which you are interested in whether there is a 3 cm or larger difference between the means of two populations that each have a population standard deviation is 15 cm. You decide that a power of 0.080 is appropriate for your purposes. If you use a two-sample t-test with a = 0.05, what would the approximate minimum sample size be for each of the samples?

A) n = 380
B) n = 390
C) n = 400
D) n = 410