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Question
Suppose that a tire manufacturer uses
and R charts based on subgroups of size 4 to monitor tire diameter. The and R charts are found to be in statistical control, with
= 50.25, 
= 8. 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
Answer
This answer is hidden. It contains 2 characters.
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