A quality analyst wants to construct a sample mean chart for controlling a packaging process Each day last week, he randomly selected four packages and weighed each The data from that activity appear below Day(Samples) Weight (Observations) Package 1 Package 2 Package 3 Package 4 Monday 23 22 23 24 Tuesday 23 21 19 21 Wednesday 20 19 20 21 Thursday 18 19 20 19 Friday 18 20 22 20 Construct x bar and R charts considering z 3 Is the process in control

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

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

Day(Samples)	Weight (Observations)
Day(Samples)	Package 1	Package 2	Package 3	Package 4
Monday	23	22	23	24
Tuesday	23	21	19	21
Wednesday	20	19	20	21
Thursday	18	19	20	19
Friday	18	20	22	20

Construct x-bar and R-charts considering z=3. Is the process in control?

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