A brewer bottles beer labeled "net weight 12 ounces." A production employee pulled 20 random samples of 5 bottles each throughout the day and found that the average weight is exactly 12 ounces and the average range of the samples is 0.25 ounce.What is the lower control limit for the averages chart for this process?
A) 12.144 ounces.
B) 11.955 ounces.
C) 11.856 ounces.
D) None of the above.

Question

Quizplus · Accepted Answer

The overall average is given as 12 oz. The sample size is 5, so A2 is 0.577. LCL = 12 - (.577)(.25) = 11.856.

A Brewer Bottles Beer Labeled "Net Weight 12 Ounces