Discover what quartiles are in statistics, how to calculate them, and see examples to help you interpret data more ...

Learn how to calculate the interquartile range from a variety of different data types and draw and interpret box-and-whisker diagrams.

A cumulative frequency diagram is also a good way to find the interquartile range, which is the difference between the upper quartile and lower quartile. The interquartile range is a measure of ...

We discourage the use of a diagnostic for normality: the interquartile range divided by the standard deviation. This statistic has been suggested in several introductory statistics books as a method ...