Question

What is the variance of the following data? If necessary, round your answer to two decimal places.
10, 16, 12, 15, 9, 16, 10, 17, 12, 15
A. 7.56
B. 7.66
C. 7.76
D. 7.86

Answer 1

The variance is the average of the squared differences from the mean. The average of those numbers is 13.2. Find out about the difference from each of those numbers to the mean. Square those numbers. Add them all up and divide by 10. The answer 7.76