Question

A sample of n = 15 scores has M = 20 and s² = 9. What is the sample standard deviation?

Select one:
a. 3
b. 81
c. 9
d. 4.5

Answer 1

The sample standard deviation is 3. Hence, a) is correct.

Step-by-step explanation:

To find the sample standard deviation, we need to take the square root of the sample variance. The sample variance (s²) is given as 9.

Therefore, the sample standard deviation (s) = √9 = 3.

So, the correct answer is option a. 3.