Business, 17.06.2021 18:30 alessandrotabares

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 appear below. Weight
Day 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
A. Calculate upper 2-sigma x-bar chart control limit that allow for natural variations
B. Calculate lower 2-sigma x-bar chart control limit that allow for natural variations
C. Based on the x-bar chart, is this process in control?
Process is in control
Process is out of control
Process is almost within control limits
We don't have enough information

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A quality analyst wants to construct a sample mean chart for controlling a packaging process. He kno...

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