Question: Please help. thank you A quality analyst wants to construct SPC charts for controlling a packaging process. He knows from past experience that the process

Please help. thank you

A quality analyst wants to construct SPC charts 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 appear below. Day Package 1 Monday 23 Tuesday 23 Wednesday 20 Thursday 18 Friday 18 Weight Package 2 Package 3 22 23 21 19 19 20 19 20 Package 4 24 21 21 19 20 22 20 Determine the upper and lower control limits for sample means and ranges. Is this process under control (2=2)

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