Weighted mean
In this example, I would like to calculate Column 2 mean based on mean of each Group. Group 3 has two values, and the mean of Group 3 is (3+9)/2= 6. So I would need to get the by-Group column 2 mean : (3+3+(3+9)/2) /3 = 4. When I use Tabulate or Column Mean (:Column2 ) to get the statistics, each individual column2 values were used separately for calculating the mean (3+3+3+9)/4 = 4.5. How to g...