Chart Preparation Exercise (6)

The next step is to calculate the mean of all the moving range values (R-bar). This calculation is very similar to the one for the X values. Once again, the first step is to add together all of the range values. Enter this total in the box outlined in red and then click the button to check your answer.

SUM X No. of Samples X-bar
÷ =
 
SUM R No. of Samples
(Minus one)
R-bar
÷ =