Problem:
Six samples of subgroup size 3 (n=3) were collected.
Required:
Question 1) Determine the upper control limit (UCL) for an X-Bar chart if the mean of the sample averages is 4.7 and mean of the sample ranges is 0.35.
CHART
UCL = 4.86905
UCL = 4.90195
UCL = 4.72250
UCL = 5.05805
Solve the problem and show all work.