Calculating Percentiles using Mean and Standard Deviation. In order to calculate percentiles using mean and standard deviation, we need to make some assumptions about our data. We will assume that our ...

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For example, if your mean is in cell A2, population mean in cell B2, standard deviation in cell C2, square root of degrees of freedom in E2, type the formula as =(A2-B2)/(C2/E2) to generate the T ...