The standard deviation is a commonly used measure of variability that indicates the average difference between scores in a distribution and their mean.

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Quizplus · Accepted Answer

The statement is true. Standard deviation is a measure of how spread out the data in a distribution is, and it is calculated by taking the square root of the variance. It tells us how far, on average, each score is from the mean.

The Standard Deviation Is a Commonly Used Measure of Variability