For an in control process with subgroup data n = 4, X-bar = 20, and R-bar =

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For an in control process with subgroup data n = 4, X-bar = 20, and R-bar = 2, find the estimate of

a. The population mean of all X values.

b. The population standard deviation of all X values.

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Business Statistics A First Course

ISBN: 9780321979018

7th Edition

Authors: David M. Levine, Kathryn A. Szabat, David F. Stephan

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