Question: Consider the data presented in Table 121 for the tracking arm example. Suppose that an R chart is constructed based on sample numbers 1 to

Consider the data presented in Table 12–1 for the tracking arm example. Suppose that an R chart is constructed based on sample numbers 1 to 15 only.

a. What is the estimate of  obtained from these 15 observations only?

b. What are the values of the UCL and LCL for an R chart based on these observations only?

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