Which measure of variability is used for interval-ratio variables and is the square root of the average of the squared deviations from the mean?
A)IQV
B)Interquartile range
C)Variance
D)Standard deviation

Question

Quizplus · Accepted Answer

The standard deviation is used for interval-ratio variables and is the square root of the average of the squared deviations from the mean. The other options, IQV and interquartile range, are measures of variability used for ordinal variables and the variance is also used for interval-ratio variables, but is not as commonly used as the standard deviation.

Which Measure of Variability Is Used for Interval-Ratio Variables and Is