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What was the power of the test

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Studies in the general population suggest that the gestational length of uncomplicated pregnancies varies according to a Normal distribution with μ = 39 weeks with σ = 2 weeks. Suppose a two-sided test was conducted on a sample of 22 middle-class African American women to determine whether the mean gestation period in the African America women is significantly different from the expected value of 39 weeks, and a conclusion was drawn. Now suppose you find that the gestational length in African American women is actually 38.5 weeks. What was the power of the test with α = 0.05.

Reference no: EM131897980

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