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The Flamerock Tire company manufactures a particular tire model that has a mean lifetime of 65,000...

The Flamerock Tire company manufactures a particular tire model that has a mean lifetime of 65,000 miles with a standard deviation of 4500 miles. The lifetimes are normally distributed. What is the probability that one of these tires selected at random will last 70,000 miles or more?

Math   Statistics-And-Probability   
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Answer #1

Given that,

Mean = 65000 miles

Standard deviation = 4500 miles

We want to find that, P(X >= 70000 miles)

the probability that one of these tires selected at random will last 70,000 miles or more is 0.1335

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