Hi bwanders,
The attached table includes the original formula columns, as well as three new columns to represent rolling three separate die. Then, there is a column that takes the mean of those three rolls. I also added some new scripts to the side to include the control-chart plot of those means (like what was done before with the moving average), and also included a script for the distribution of the means obtained from however many rolls of three dice you have in the table. Is this what you were looking for?
I hope this helps!
julian