Editing Mean (section)

===Interquartile mean===
The [[interquartile mean]] is a specific example of a truncated mean. It is simply the arithmetic mean after removing the lowest and the highest quarter of values.
: <math>\bar{x} = \frac{2}{n} \;\sum_{i = \frac{n}{4} + 1}^{\frac{3}{4}n}\!\! x_i</math>

assuming the values have been ordered, so is simply a specific example of a weighted mean for a specific set of weights.