The following observations are DDT concentrations in the blood of 20 people:

Use the normal scores from Exercise 7.84 to construct a normal probability plot, and comment on the appropriateness of a normal probability model.

Data from Exercises 84

The paper “The Load-Life Relationship for M50 Bearings with Silicon Nitride Ceramic Balls” (Lubrication Engineering [1984]: 153–159) reported the following data on bearing load life (in millions of revolutions); the corresponding normal scores are also given:

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