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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.

Question 4.93

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:

  1. The probability that a tire lasts more than 50,000 miles.
  2. .
  3. .

4.93

(a) 0.5 (b) 0.0344. (c) 0.0344.