1. The problem statement, all variables and given/known data Howdy I got a datasheet in the SAS data system with 3 variables and 60 obs. How do I most simply get SAS to calculate the variance? 2. Relevant equations 3. The attempt at a solution data cnn; input vara varb snt@@; datalines; ..... ...... ...... run; proc sort; by vara; run; proc means; by vara; run; Which code to I add to get it to calculate the variance of the three vars?? Thanks in advance Maria.