Question: 1:35:08 1:58:02 sidebar interaction. Press tab to begin. Formula to use: sample size = [ (z-score * StdDev)/error you are willing to live with]^2 Assume,
1:35:08 1:58:02 sidebar interaction. Press tab to begin. Formula to use: sample size = [ (z-score * StdDev)/error you are willing to live with]^2 Assume, std dev is 0.3868, mean is 4.0 What sample size do you need to detect a 0.1 point difference with 95% confidence
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