If we know that a set of test scores has a mean of 75 and a standard deviation of 8, we would conclude that
A) the average deviation from the mean is about 8 points.
B) the average person will have a score of 75 + 8 = 83.
C) more people are above 75 than below it.
D) You can't tell anything about how scores lie relative to the mean.

Question

Quizplus · Accepted Answer

The standard deviation measures the average distance of the data points from the mean, which in this context means the average deviation from the mean is about 8 points.

If We Know That a Set of Test Scores Has