Question: You plan to repeat the study. You want an alpha = 0.05 paired-T test to have 80% power to detect a difference of 3.6 when

You plan to repeat the study. You want an alpha = 0.05 paired-T test to have 80% power to detect a difference of 3.6 when the sd of the difference is 3.0. What sample size (number of pairs) is needed?

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