Multiple Choice
Suppose that a tire manufacturer uses 
and R charts based on subgroups of size 4 to monitor tire diameter.The 
andR charts are found to be in statistical control,with 
inches.A histogram of the tire diameter measurements indicates that these measurements are approximately normally distributed.Find the sigma level capability of the process.
A) 1.93
B) 3.22
C) 0.64
D) 0.22
Correct Answer:
Verified
Correct Answer:
Verified
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