Repair Cost for Microwave OvensThe average repair cost of

Chapter 6, Problem 27CQ

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QUESTION:

Problem 27CQ

Repair Cost for Microwave OvensThe average repair cost of a microwave oven is $55, with a standard deviation of $8. The costs are normally distributed. If 12 ovens are repaired, find the probability that the mean of the repair bills will be greater than $60.

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QUESTION:

Problem 27CQ

Repair Cost for Microwave OvensThe average repair cost of a microwave oven is $55, with a standard deviation of $8. The costs are normally distributed. If 12 ovens are repaired, find the probability that the mean of the repair bills will be greater than $60.

ANSWER:

Answer

Step 1 of 1

(a)

The average repair cost of a microwave oven is $55, with a standard deviation of $8.

If 12 ovens are repaired, we are asked to find the probability that the mean of the repair bill will be greater than $60.

Assume the variable is normally distributed.

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