If a set of data has 81 values with a variance of 26.0, then the standard deviation is _________.
A) 2.9
B) 0.6
C) 0.3
D) 5.1

Question

Quizplus · Accepted Answer

The standard deviation is the square root of the variance. Therefore, to find the standard deviation, we need to take the square root of 26.0. Using a calculator or estimating, we find that the square root of 26.0 is a little over 5. Therefore, the best choice is D, 5.1, which is the closest option to the square root of 26.0.

If a Set of Data Has 81 Values with a Variance