How to calculate standard deviation from mean and probability?
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What's the formula to calculate the standard deviation knowing the mean and a certain probability, but not knowing all the n's. http://stattrek.com/online-calculator/normal.aspx For example, ^that calculator only requires mean and a probability of Z to calculate the mean... so how does it do that? What's the formula? And how can I do it by myself in a CAS software during an exam?
standard-deviation
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asked Apr 1 '14 at 22:12
John
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