In a statistic class,10 scores were randomly selected with the following results were obtained (mean = 71.5): 74,73,77,77,71,68,65,77,67,66 What is the variance?
A)22.72
B)12.00
C)4.77
D)516.20
E)144.00

Question

Quizplus · Accepted Answer

The variance is calculated by finding the average of the squared differences from the mean. The squared differences from the mean (71.5) for each score are summed and then divided by the number of scores (10) to get the variance, which is 22.72.

In a Statistic Class,10 Scores Were Randomly Selected with the Following