Question: A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is in control, package weight is normally distributed with a mean of 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each Day Monday Tuesday Weight (ounces) 22 23 19 20 20 22 23 23 21 Wednesday 20 19 Thursday 18 19 Friday 18 20 0.1 ounces 0.4 ounces 0.5 ounces 1 ounce 2 ounces 24 21 21 19 20 What is the standard deviation of the sampling distribution of sample means for whenever this process is in control?

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is in control, package weight is normally distributed with a mean of 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each What is the standard deviation of the sampling distribution of sample means for whenever this process is in control? 0.1 ounces 0.4 ounces 0.5 ounces 1 ounce 2 ounces

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