Percentile Command

Percentile[<List of Numbers>, <Percent>]

Let P equal the given Percent.

Returns the value that cuts off the first P percent of the number list when the list is sorted in ascending order. Percent must be a number in the interval 0 < P ≤ 1.

Note: The commands Quartile and Percentile use different rules and do not always return matching results.

Example:

Q1[{1,2,3,4}] yields 2.

Percentile[{1,2,3,4}, 0.25] yields 1.