A shoe store sold 340 pairs of shoes in one day. The number of pairs f athletic shoes sold was 4 more then twice the number of p
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We have been given that the standard deviation of a group of 20 scores is 15 and we are asked to find variance.
Since we know variance is square of standard deviation. In order to find out the variance of the given data we have to take the square of 15.
Therefore, our variance is 225.