Question: Problem 1. (25 p.) A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that

Problem 1. (25 p.) A quality analyst wants to

Problem 1. (25 p.) 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 kilograms. Each day last week, he randomly selected four packages and weighed each. The data from that activity appears below. Weight (kilograms) Day Package 1 Package 2 Package 3 Package 4 Monday 23 22 13 24 Tuesday 23 21 19 21 Wednesday 20 19 20 21 Thursday 18 19 20 19 Friday 18 20 22 20 a. (10 p.) Develop limits for an appropriate control chart for the means of the process. b. (10 p.) Develop limits for an appropriate control chart for the ranges of the process. c. (5 p.) Is the process in control? Justify your

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