SMALL(n1, n2, ..., k)
SMALL returns the k-th smallest value in a data set.
If data set is empty SMALL returns #NUM! error. If @k <= 0 or @k is greater than the number of data items given SMALL returns #NUM! error.
This function is Excel compatible.
Let us assume that the cells A1, A2, ..., A5 contain numbers 11.4, 17.3, 21.3, 25.9, and 40.1. Then
SMALL(A1:A5,2) equals 17.3.
SMALL(A1:A5,4) equals 25.9.
PERCENTILE, PERCENTRANK, QUARTILE, LARGE.