Question: Data were collected on a quantitative measure with subgroups of four observations. Twenty-five subgroups were collected, with the following results: a. Determine the Shewhart factors

Data were collected on a quantitative measure with subgroups of four observations. Twenty-five subgroups were collected, with the following results:

a. Determine the Shewhart factors that will be needed if - and R -charts are to be developed.
b. Compute the upper and lower control limits for the R -chart.
c. Compute the upper and lower control limits for the -chart.

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