UsableStats: Want a sample size of about 60 (30 controls and 30 cases). At 5% significance and 80% power.How do i

Question 327:

Asked on August 8, 2008

Tags: Standard Deviation , Power , Mean Difference

Want a sample size of about 60 (30 controls and 30 cases). At 5% significance and 80% power.How do i determine the standard deviation and mean difference.And how do i arrive at the 60? my study design is case-control.

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