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Multiply them as you would any two numbers.

However, you should note that the standard deviation of a product of two variables is not the product of their standard deviations.

That is, SD(XY) ≠ SD(X)*SD(Y)

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13y ago

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Related Questions

How do you calculate two standard deviations of the mean?

See the related links on how to calculate standard deviation. If there are more than a dozen data points, it is tedious to calculate by hand. Use excel or an online calculator. To get 2 standard deviations, multiply the calculated std deviation by 2.


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How many standard deviations is 16.50 from the mean?


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