Question: If mu_{g} = true mean difference in DBP between baseline and 1 month, then how many patients would be needed to have a 90% chance

If mu_{g} = true mean difference in DBP between baseline and 1 month, then how many patients would be needed to have a 90% chance of detecting a significant change in DBP over 1 month using a one-tailed test with a significance level of 596? Assume that the true mean and standard deviation of the DBP difference were the same as observed in the pilot study

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