Based on your conceptual knowledge of what a standard deviation is,which of the following is the standard deviation of the scores 2,2,4,and 4?
A)1
B)2
C)3
D)4

Question

Quizplus · Accepted Answer

The standard deviation measures the amount of variation or dispersion of a set of values. For the scores 2, 2, 4, and 4, the mean is 3. The differences from the mean are -1, -1, 1, and 1, respectively. Squaring these differences gives 1, 1, 1, and 1. The average of these squared differences is 1, and the square root of this average, which is the standard deviation, is 1.

Based on Your Conceptual Knowledge of What a Standard Deviation