Given the following set of scores X : 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1 What is the variance?
A) 20.6
B) 4.54
C) 18.7
D) 4.3

Question

Quizplus · Accepted Answer

The variance of a set of scores is calculated by finding the mean (average) of the scores, then for each score, subtracting the mean and squaring the result, and finally, averaging these squared differences. For the given set X: 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1, the mean is 7.73. The squared differences from the mean are then averaged to find the variance, which calculates to approximately 20.6.

Given the Following Set of Scores X : 10, 12