The length of time to perform an oil change at a certain

Chapter 4, Problem 18SE

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QUESTION:

The length of time to perform an oil change at a certain shop is normally distributed with mean 29.5 minutes and standard deviation 3 minutes. What is the probability that a mechanic can complete 16 oil changes in an eight-hour day?

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QUESTION:

The length of time to perform an oil change at a certain shop is normally distributed with mean 29.5 minutes and standard deviation 3 minutes. What is the probability that a mechanic can complete 16 oil changes in an eight-hour day?

ANSWER:

Step 1 of 2:

Here it is given that time length to perform an oil change is distributed normally with mean 29.5 minutes and standard deviation 3 minutes.

Let us denote the time length as X,Then X~N(29.5,).


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