The most commonly used measure of variability used with interval and ratio data is the
A) standard deviation.
B) mean.
C) quartile deviation.
D) range.

Question

Quizplus · Accepted Answer

The standard deviation is a widely used measure of variability for interval and ratio data because it takes into account the distance between each data point and the mean of the data set. It provides information on the spread or dispersion of the data around the mean. The other options (mean, quartile deviation, and range) do not provide as comprehensive a measure of variability.

The Most Commonly Used Measure of Variability Used with Interval