The Lifetime of a Certain Type of Automobile Tire (In $\mu = 40$

question 22

Multiple Choice

The lifetime of a certain type of automobile tire (in thousands of miles) is normally distributed with mean $\mu = 40$ and standard deviation $\sigma = 7$ . What proportion of tires have lifetimes of less than 42 Thousand miles?

• A) 0.3070
• B) 0.6930
• C) 0.3859
• D) 0.6141

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Definitions:

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Emergency Commitment

The temporary commitment to a mental hospital of a patient who is behaving in a bizarre or violent way.

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