Hello, I'm working with a large column of data that has "mixed" results in each row. However, every third row contains numbers for which I want to compute the decile function for the entire column. I'm attaching a sample spreadsheet using 150 rows of data with which to perform hopefully the right approach. To the right, I show a "manually" calculated correct performance using the regular decile function. I could use some help with an approach the will calculate the Xth decile on every Nth row in a column. thanks for your help!