The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals
A)0
B)4096
C)8
D)6,561

Name: The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals A)0 B)4096 C)8 D)6,561
Brand: Quizplus
Rating: 4.8 (36 reviews)

Question

Quizplus · Accepted Answer

The standard deviation of the sample can be found by taking the square root of the variance. 
So, the standard deviation = sqrt(64) = 8. Therefore, the answer is choice C.

The Variance of a Sample of 81 Observations Equals 64