Question

Is a measure of dispersion that indicates how much scores in a sample vary around the mean of the sample?

Answer 1

The measure of dispersion that indicates how much scores in a sample vary around the mean of the sample is the standard deviation.

Answer 2

The measure is called STANDARD DEVIATION.
Standard deviation is a mathematical measure that is used to evaluate the difference between the mean value of a set of number and each value in the group. It is calculated as the square root of variance by determining the variation between each data point relative to the mean.