The most widely used way of describing the spread of a group of scores is the:
A)range
B)variance
C)square root transformation
D)standard deviation

Question

Quizplus · Accepted Answer

The most commonly used way of describing the spread of a group of scores is the standard deviation, which measures the average distance of scores from the mean. The range only describes the difference between the highest and lowest scores, without taking into account the distribution of scores in between. The variance is another measure of spread, but it is less intuitive than the standard deviation since it is the average squared deviation from the mean. The square root transformation is a statistical technique that is used to normalize data, but it is not a measure of spread in itself.

The Most Widely Used Way of Describing the Spread of a Group