Table 15-1

-Refer to Table 15-1.The Pristine Paint Company produces paint in gallon cans.They have found that in more than 10 samples of 8 cans each, the average gallon can contains 1.1 gallons of paint.The average range found over these samples is 0.15 gallons.What is the upper control limit for the sample averages in this process?
A)1.100
B)1.150
C)1.268
D)1.156

Question

Table 15-1
 
-Refer to Table 15-1.The Pristine Paint Company produces paint in gallon cans.They have found that in more than 10 samples of 8 cans each, the average gallon can contains 1.1 gallons of paint.The average range found over these samples is 0.15 gallons.What is the upper control limit for the sample averages in this process?
A)1.100 
B)1.150 
C)1.268 
D)1.156

Quizplus · Accepted Answer

The upper control limit (UCL) for the sample averages is calculated using the formula: UCL = X̄ + A2 * R̄. Here, X̄ is the average of the sample means (1.1 gallons), R̄ is the average range (0.15 gallons), and A2 is a constant that depends on the sample size (for n=8, A2 is approximately 0.373). Thus, UCL = 1.1 + (0.373 * 0.15) = 1.156.

Table 15-1 -Refer to Table 15-1.The Pristine Paint Company Produces Paint in Company