I used a $+TBLFM: $2=pstdev(@<..@>) and am none too sure that's even correct syntax to calculate a population standard deviation on column 2. What would be the syntax to make this operation also happen on columns 3-5 as well? I didn't get into spread notation of b2:b330 since I don't know the syntax for calculating a whole column in the spreadsheet format. -- Twitter: JudeDaShiell