The standard deviation of a test indicates the extent to which
A) any given student outscores others who took the same test.
B) students score the same on the first half versus the second half of the test.
C) students score the same on repeated administrations of the test.
D) any score in a distribution varies from the mean.

Question

Quizplus · Accepted Answer

The standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range. Therefore, option D is correct as it directly refers to how scores vary from the mean of the distribution.

The Standard Deviation of a Test Indicates the Extent to Which