What is the variance of the following data? If necessary, round your answer to two decimal places.10, 12, 15, 18, 11, 13, 14, 16, 19, 20

Expert Answers
baxthum8 eNotes educator| Certified Educator

To find the variance, first find the mean.

Mean is the average of the data:  14.8

Variance is the average of the squared differences from the mean.

So:

`((10-14.8)^2 + (12-14.8)^2 + (15-14.8)^2 + (18-14.8)^2 + (11-14.8)^2 + (13-14.8)^2 + (14-14.8)^2 + (16-14.8)^2 + (19-14.8)^2 + (20-14.8)^2) / 10`

The variance =  10.56