For the following questions use these test scores:
Person A = 12
B = 10
C = 9
D = 8
E = 6
-The standard deviation is:

Question

For the following questions use these test scores:
Person A = 12
            B = 10
            C = 9
            D = 8
            E = 6
-The standard deviation is:

Quizplus · Accepted Answer

The standard deviation is calculated by finding the square root of the variance. The variance is the average of the squared differences from the mean. Here, the mean is 9, and the squared differences are 9, 1, 0, 1, and 9. The average of these is 4, and the square root of 4 is 2.

For the Following Questions Use These Test Scores