Suppose That and R Charts Based on Subgroups of Size

question 106

Multiple Choice

Suppose that and R charts based on subgroups of size 4 are being used to monitor the tire diameter of a new radial tire.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.Compute the natural tolerance limits for this process.

• A)[48.68,52.32]
• B)[49.89,51.11]
• C)[48.86,52.14]
• D)[46.75,54.25]

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