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 23 24 Tuesday 23 21 19 21 Wednesday 20 19 20 21 Thursday 18 19 20 19 Friday 18 20 22 20 a Develop limits for an appropriate control chart for the means of the process (Show whole process with all appropriate formulas) b Develop limits for an appropriate control chart for the ranges of the process (Show whole process with all appropriate formulas) c Is the process in control Properly justify your answer

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Question: 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

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	23	24
Tuesday	23	21	19	21
Wednesday	20	19	20	21
Thursday	18	19	20	19
Friday	18	20	22	20

a. Develop limits for an appropriate control chart for the means of the process. (Show whole process with all appropriate formulas)

b. Develop limits for an appropriate control chart for the ranges of the process. (Show whole process with all appropriate formulas)

c. Is the process in control? Properly justify your answer.

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