![]() Fortunately, the STDEV.P function in Excel can execute all these steps for you. Divide by the number of data points (N = 5).ħ. For each number, calculate the distance to the mean.ģ. The STDEV.P function uses the following formula: The entire population consists of 5 data points. You have the test scores of all students. For example, you're teaching a group of 5 students. The STDEV.P function (the P stands for Population) in Excel calculates the standard deviation based on the entire population. ![]() As a result, the numbers have a high standard deviation. The numbers below also have a mean (average) of 10.Įxplanation: the numbers are spread out. As a result, the numbers have a low standard deviation.ģ. The numbers below also have a mean (average) of 10.Įxplanation: the numbers are close to the mean.
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