Question: How much power would such a study have using a two-sided test with significance level = .05, assuming that the estimates of the population parameters

How much power would such a study have using a two-sided test with significance level = .05, assuming that the estimates of the population parameters in the pilot study are correct?

Suppose 40 children, both of whose parents smoke, and 50 children, neither of whose parents smoke, are recruited for the study.

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