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Question: four samples of three observations each have been taken with...

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Four samples of three observations each have been taken, with actual measurements (in centimeters) shown below. Be careful when you approach this question, the data presentation format is a little different than what you may see in your book or notes. The sample size here is 3 and the number of samples are 4.

..........Sample Number...

1...........2..........3...........4

12.3....11.9....12.0....12.1

12.2....12.2....12.2....11.8

12.1....12.2....11.8....11.8

Find the UCL for the X-bar control chart.

12.269
12.357
12.350
12.500
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