Question: 1) A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that the process standard

1) A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that the process standard deviation is two ounces. Each day last week, he randomly selected four packages and weighed each. The data from that activity appears below. Weight Day Package 1 Package 2 Package 3 Package 4 Monday 23 22 23 Tuesday 23 21 Wednesday 20 19 20 Thursday 19 20 19 Friday 20 22 24 19 21 21 20 (a) (b) Calculate all sample means and the mean of all sample means. Calculate upper and lower control limits that allow for natural variations. Is this process in control

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