How do you calculate the Quintile for groups of rows in Excel

Question

I found a partial answer to this question under How do you calculate the Quintile for every row in Excel?. I would like to derive the same quintile data for each row but I need the quintiles to be based on groups that are determined by a value in another column.

Answer 1

Use this formula:

=MAX(1,ROUNDUP(10*PERCENTRANK($C:$C,$C2,4),0))

To divide into whichever many groups you need, change the value 10; it now creates decile groupings. Change $C2 to the cell in the first row with the target value and autofill down, then change $C:$C to the column with the target range of values.

Your result will be a division of the population into groups, with 1 being the lowest value and everything higher representing a higher value.