1. An operator trainee is attempting to monitor a filling process that has an overall average of 743 cc. The average range is 20 cc. If you use a sample size of 8, what is the upper control limit for the x-bar chart?

2. An different operator trainee is attempting to monitor a similar filling process that has an overall average of 491 cc. The average range is 12 cc. This operator is using a sample size of 9, what is the lower control limit for the x-bar chart?