Question: Day 18 A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that when the

Day 18 A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that when the process is operating as intended, packaging weight is normally distributed with a mean of 20 ounces, and a process standard deviation of 2 e ounces. Each day last week, he randomly selected four packages and weighed each. The data from that activity appear below. Weight Package 1 Package 2 Package 3 Package 4 Monday 23 22 23 24 Tuesday 23 21 19 21 Wednesday 20 19 20 21 Thursday 19 19 Friday 18 20 a. (1 pt) The average of the process means (X bar bar) is: (enter your response rounded to 1 decimal b. (1 pt) The average of the process range (bar): (enter your response rounded to 1 decimal) c. (1 pts) The 3 sigma lower controllimit for process mean is (enter your response rounded to 2 decimals) d. (2 pts) The 3 sigma upper controllimit for process mean is center your response rounded to 2 decimals e (1 pts) The 2 sigma lower controllimit for process range is (enter your response rounded to 2 decimal f. (2 pts) The 2 sigma upper controllimit for process range is fenter your response rounded to 2 decimal) 8. (2 pts) is the process is in control? 20

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