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 Weight (ounces) Monday 23 22 23 Tuesday 23 21 19 Wednesday 20 19 20 18 19 20 Thursday Friday 18 20 22 What is the sample mean package weight for Thursday? 2 19 ounces 20 ounces 20.6 ounces 21 ounces 23 ounces Question 2011 point) F2 W A+ 3 F3 E Saved 4 R 24 21 21 19 20 F5 % 5 T F6 F7 & 7 F8 F9 9

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