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 ...

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 ...

Earlier this year, this column explored two ways to describe data dispersion: trimmed means and weighted averages. Those two are siblings in a large family. Others members of the family include the ...

The range of a set of numbers is the largest value, subtract the smallest value. \(range = largest~number - smallest~number\) The mass of 7 babies are as follows: 2.5 kg, 3.1 kg, 3.4 kg, 3.5 kg, 3.5 ...