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 Everyday Examples
 Variance:  A measure of how spread out a set of data is.
A test given to a class is scored between 0 and 10. Here are the scores: 5, 6, 7, 7, 8, 8, 9, 9, 9, 10, 10. The mean is 8. Using the formula, here is the variance.


The standard deviation is the square root of the variance, which equals…