Function Interquartile-Range

Part of:

package cl-mathstats
( interquartile-range &rest < args > )

interquartile-range (data)
The interquartile range is similar to the variance of a sample because both
are statistics that measure out spread out'' a sample is. The interquartile
range is the difference between the 3/4 quantile (the upper quartile) and the
1/4 quantile (the lower quartile).