Question: 2) We wish to develop a mean chart in order to monitor the checkout time at a retail store. To develop the chart we have

2) We wish to develop a mean chart in order to

2) We wish to develop a mean chart in order to monitor the checkout time at a retail store. To develop the chart we have collected six samples of size n=16 observations from a time when the process was known to be in control. The sample means and ranges have been computed (see table below). 1 2 Sample Mean Range 3 .05 0.42 3 .17 0.50 13.09 0.39 3.13 0.46 3 .15 10.48 16 13.50 10.45 5 a) Please develop the X-bar chart by determining the center line, lower control limit, and upper control limit b) We have collected a new sample (values listed below). Is the process still in control? 2.98, 3.30, 2.86, 2.89, 3.03, 3.26, 3.09, 2.82, 3.04, 2.94, 3.20, 3.14, 3.07, 3.07, 2.84, 3.14

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