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For Exercises 4.90 and 4.91, see page 212; for 4.92, see page 214; and for 4.93, see page 216.
4.93 Normal probabilities.
Example 4.27 gives the Normal distribution for the tread life of a type of tire (in miles). Calculate the following probabilities:
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(a) 0.5 (b) 0.0344. (c) 0.0344.