The PERCENTILE.INC function
It returns the k-th percentile of values in a range, where k is in the range 0..1, inclusive.
It returns the k-th percentile of values in a range, where k is in the range 0..1, inclusive.
In statistics, the quartiles, of a ranked set of data values, are the three points that divide the set into four equal groups. Each group constitutes a quarter of the data.