The interquartile range is another measure of spread, except that it has the added advantage of not being affected by large outlying values. In order to calculate this value we must first understand ...

The interquartile range (IQR) is a statistical measure of the middle values of a sample data set that is separated into four equal parts. This middle-value grouping can provide a median range between ...

Box-and-whisker plots are a really effective way to display lots of information. These plots contain the range, interquartile range, median, lower value, upper value, lower quartile and upper quartile ...