Which of the Following Is False About Standard Deviations

Multiple Choice

Which of the following is false about standard deviations?

A) It tells how wide the variation of any set of cases is.
B) It is the square root of the variance.
C) It is the square root of the average squared deviation of each case from the mean.
D) It is the preferred measure of variability when a variable in normally distributed.
E) It is a measure of central tendency.