Construct normal probability plots for two groups of the data: the first 40 and the last 40

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Construct normal probability plots for two groups of the data: the first 40 and the last 40 observations. Construct both plots on the same axes.

What tentative conclusions can you draw?

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Applied Statistics And Probability For Engineers

ISBN: 9780471204541

3rd Edition

Authors: Douglas C. Montgomery, George C. Runger

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