The variance of a set of scores is
A) the square root of the standard deviation.
B) the mean of the squared differences of each number from the mean in a set of numbers.
C) always a number equal to the square root of the range.
D) always a number greater than 1.
E) measured in the same metric as the original scores.

Question

Quizplus · Accepted Answer

The variance of a set of scores is defined as the mean of the squared differences of each number from the mean in a set of numbers. This calculation gives a measure of how spread out the numbers in the set are.

The Variance of a Set of Scores Is