Brett's Springs wants to construct a control chart for determining if 3 of his warehouse machines' processes are in control In order to use this quality tool, Sheila, the warehouse manager, sampled four units of output from each machine, with the following results Sample Measurements Observations Machine 1 17 15 15 17 Machine 2 16 25 18 25 Machine 3 23 24 23 22 What is the grand mean for the samples taken What are the mean control chart upper and lower control limits What is the average range based upon this limited sample If control chart limits of 23 29 and 16 71 are used, which machine(s), if any, appear(s) to have an out of control process mean What are the range control chart upper and lower control limits

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Question: Brett's Springs wants to construct a control chart for determining if 3 of his warehouse machines' processes are in control. In order to use this

Brett's Springs wants to construct a control chart for determining if 3 of his warehouse machines' processes are in control. In order to use this quality tool, Sheila, the warehouse manager, sampled four units of output from each machine, with the following results:

Sample	Measurements/Observations
Machine#1	17	15	15	17
Machine#2	16	25	18	25
Machine#3	23	24	23	22

What is the grand mean for the samples taken?

What are the mean control chart upper and lower control limits?

What is the average range based upon this limited sample?

If control chart limits of 23.29 and 16.71 are used, which machine(s), if any, appear(s) to have an out-of-control process mean?

What are the range control chart upper and lower control limits?

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