How to Find the Variance and Standard Deviation

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‘Variance’ of a set is the measure of how far the number set is spread out from its average value.

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The next step is to find each score’s deviation from the mean.

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Square each of the deviated numbers that we found in the previous step and add them all.

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Divide this sum of the squares of the deviated numbers by the sample size and it gives the variance of the data set.

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‘Standard deviation’ gives the idea of how close the numbers are to the mean.

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We can calculate the standard deviation by finding the square root of the calculated variance of a given data set.

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This is how we find the variance and standard deviation for a data set. Share these with your friends.

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