Consider a Situation in Which You Are Interested in Whether

question 7

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

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