A Quality Analyst wants to construct a mean chart for controlling a packaging process She knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and an unknown standard deviation Each day last week, she randomly selected four packages and weighed each Day WEIGHT (ounces) 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 What are the upper and lower control limits of the x bar chart, assuming that the process standard deviation is unknown Question 2 options 23 6 ounces and 17 6 ounces 22 64 ounces and 18 56 ounces 18 56 ounces and 22 64 ounces 17 6 ounces and 23 6 ounces None of them

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Question: A Quality Analyst wants to construct a mean chart for controlling a packaging process. She knows from past experience that whenever this process is under

A Quality Analyst wants to construct a mean chart for controlling a packaging process. She knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and an unknown standard deviation. Each day last week, she randomly selected four packages and weighed each:

Day	WEIGHT (ounces)
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

What are the upper and lower control limits of the x-bar chart, assuming that the process standard deviation is unknown?

Question 2 options:

	23.6 ounces and 17.6 ounces
	22.64 ounces and 18.56 ounces
	18.56 ounces and 22.64 ounces
	17.6 ounces and 23.6 ounces
	None of them

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