Solved: Construct and interpret an R-chart for the data in

Chapter 13, Problem 26E

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QUESTION:

Construct and interpret an R-chart for the data in Exercise 13.11 (p. 13-29).

a. Calculate and plot the upper control limit and, if appropriate, the lower control limit.

b. Calculate and plot the A, B, and C zone boundaries on the R-chart.

c. Plot the sample ranges on the R-chart and determine whether the process is in control.

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QUESTION:

Construct and interpret an R-chart for the data in Exercise 13.11 (p. 13-29).

a. Calculate and plot the upper control limit and, if appropriate, the lower control limit.

b. Calculate and plot the A, B, and C zone boundaries on the R-chart.

c. Plot the sample ranges on the R-chart and determine whether the process is in control.

ANSWER:

Step 1 of 7

Here we have the data of 20 samples, which are collected for the constructing of an

-chart.

We have to calculate the mean and range for each sample.

By definitions, the mean is given as  k samples and the range

of the sample is given as

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