Standard Deviation Example Statistics. In this example n 4 and therefore n 1 3 so you divide 20 by 3 to get 6 67 which is the variance. The standard deviation for these four quiz scores is 2 58 points.
Work through each of the steps to find the standard deviation. But hang on. Calculate the mean of your data set.
Subtract the mean from each of the data values and list the differences.
S 2 92 2 3 42. It is the square root of the variance. The standard deviation for these four quiz scores is 2 58 points. Let us consider a data sample.
