As the variability of scores in the population decreases,the standard error of the mean _____,other things being equal.
A)remains constant
B)fluctuates
C)increases
D)decreases

Question

Quizplus · Accepted Answer

The standard error of the mean is inversely proportional to the square root of the sample size and directly proportional to the standard deviation. Therefore, if the variability of scores (standard deviation) decreases, the standard error of the mean will also decrease, assuming other things remain constant.

As the Variability of Scores in the Population Decreases,the Standard