Question

a standard deviation is
o a measure of how much scores vary from the mean.
o designed to describe the variability of scores in a skewed distribution.
o positive or negative, depending on the mean.
o none of the above.

Explanation:

Standard deviation is a statistical measure that quantifies the amount of variation or dispersion of a set of values. It shows how much scores vary from the mean. It is always non - negative and not specifically designed just for skewed distributions.

Answer:

A. a measure of how much scores vary from the mean.