The variance of the scores 1,4,and 7 is
A)3
B)4
C)6
D)9

Name: The variance of the scores 1,4,and 7 is A)3 B)4 C)6 D)9
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Question

Quizplus · Accepted Answer

To find the variance of a set of scores, we first need to find the mean:

(1 + 4 + 7) / 3 = 4

Next, we subtract the mean from each score, square the differences, and then find the average:

[ (1-4)^2 + (4-4)^2 + (7-4)^2 ] / 3 = (9 + 0 + 9) / 3 = 6

Therefore, the variance of the scores 1, 4, and 7 is 6.

The Variance of the Scores 1,4,and 7 Is