, the mean (average)
sample size. This value is used, together with the
value you've just calculated, in calculating the control limits.The next value we need to calculate is , the mean (average)
sample size. This value is used, together with the
value you've just calculated, in calculating the control limits.
This calculation follows the normal pattern for calculating means.
You divide the total number of items in all the samples (sum n), which
we already know, by the number of samples, which in this case is 20.
These values have already been entered into the first two boxes below.
Complete the calculation for and enter the result in the box
outlined in red. When you have done this, click the button to check
your answer.