SOLUTION: If a population has a standard deviation of 18, what is the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within
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Question 620632: If a population has a standard deviation of 18, what is the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within 2 of the true mean? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! If a population has a standard deviation of 18, what is the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within 2 of the true mean?
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n = [z*s/E]^2
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n = [1.96*18/2]^2 = 312 when rounded up
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Cheers,
Stan H.
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