Question: A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past ex process standard deviation is 1.5

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past ex process standard deviation is 1.5 ounces. Each day last week, he randomly selected four packages and weighed eac that activity appear below. Weight DAY PACKAGE 1 PACKAGE 2 PACKAGE 3 PACKAGE 4 MONDAY 23 22 23 20 TUESDAY 23 21 19 21 WEDNESDA Y THURSDAY FRIDAY 20 18 18 19 19 20 222 20 20 21 17 22

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past ex process standard deviation is 1.5 ounces. Each day last weok, he randomly solocted four packages and weighed ea that activity appear below

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