Suppose That $\overline { \mathrm { X } }$ And R Charts Based on Subgroups of Size 4 Are

question 38

Multiple Choice

Suppose that $\overline { \mathrm { X } }$
And R charts based on subgroups of size 4 are being used to monitor the tire diameter of a new radial tire.The $\overline { \mathrm { X } }$
And R charts are found to be in statistical control with $\overline { \overline { X } } = 50.25 , \bar { R } = .8$

Inches.A histogram of the tire diameter measurements indicates that these measurements are approximately normally distributed.If the tire diameter specifications are 50 inches ± 1 inch,is the process capable of meeting the specifications?

• A)Yes
• B)No

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