Question: A quality analyst wants to construct a sample mean chart for controlling a packaging process. Each day last week, she randomly selected four packages and

A quality analyst wants to construct a sample mean chart for controlling a packaging process. Each day last week, she randomly selected four packages and weighed each. The data from that activity representing the weight in ounces appear below.

Day Package 1Package 2Package3Package 4

Monday 23 22 23 24

Tuesday 25 26 21 23

Wednesday22 27 23 28

Thursday 27 28 25 22

Friday 27 29 27 26

Is the process in control considering +/- 3 sigma for variations due to natural causes?

The process is both in control and capable.

No, the process is not in control.

Yes, the process is in control.

There is insufficient information to make a decision.

The process is in control but not capable.

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