The Standard Deviation of a Distribution of Means Is Sometimes

Multiple Choice

The standard deviation of a distribution of means is sometimes called "the standard error of the mean," or the "standard error," because

A) it is an inaccurate estimate of a sample standard deviation and cannot be used to determine the variance.
B) it is calculated by summing the errors figured by subtracting sample means from the population variance.
C) it is frequently used as an "error term" when calculating the estimated sample variance.
D) it represents the degree to which particular sample means are "in error" as estimates of the mean of the population of individual scores.