Question: FedEX manager wants to control a packaging process. Last week, he randomly selects 4 packages and weighs. From the past data, he knows the process

FedEX manager wants to control a packaging process. Last week, he randomly selects 4 packages and weighs. From the past data, he knows the process standard deviation which is 2 ounces. The data from that activity appear below.

FedEX manager wants to control a packaging

Calculate upper and lower 3-sigma x-bar chart control limits that allow for natural variations. Based on the x-bar chart, is this process in control?

options:

	Process is not in control
	Process is in control

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

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