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OpenStudy (anonymous):
If the standard deviation of a population is 70 and we want the standard error (the standard deviation of the sample mean) to be 14, then we need to take
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jimthompson5910 (jim_thompson5910):
I'm assuming you want the sample size. SE = standard error SE = sigma/sqrt(n) 14 = 70/sqrt(n) now solve for n
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