Question: Reconsider the data in Exercise 6-88. Construct nor- mal probability plots for two groups of the data: the first 40 and the last 40 observations.

Reconsider the data in Exercise 6-88.

Construct nor- mal 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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