Question: 67) A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that the process standard

67) 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 ounces. Each day last week, he randomly selected four packages and weighed each. The data from that activity appear below. Weight Package 3 Package 2 Day Monday Tuesday Wednesday Thursday Friday Package 1 23 23 20 18 18 Salaala lalalalala Package 4 24 21 21 19 20 19 20 (a) Calculate all sample means and the mean of all sample means. (b) Calculate upper and lower 2-sigma r-bar chart control limits that allow for natural variations. (c) Based on the x-bar chart, is this process in control? 68) An operator trainee is attempting to monitor a filling process that has an overall average of 705 cc. The average range is 17 cc. If you use a sample size of 6, what are the upper and lower control limits for the x-bar chart and R-chart

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