Chart Preparation Excercise (13)

Next, you need to complete the calculation for the lower control limit. Enter your result in the box outlined in red below, and then click the button to check your answer. Remember that this value will also be used on the x-bar graph, and so you should round your answer to 1 decimal place.

x-double-bar 3s UCL x-bar
+ =
 
x-double-bar 3s LCL x-bar
- =