Question

Exhibit 6-6 The life expectancy of a particular brand of tire is normally distributed with a mean of 40,000 and a standard deviation of 5,000 miles. Refer to Exhibit 6-6. What is the probability that a randomly selected tire will have a life of exactly 47,500 miles? 0.4332 0.9332 0.0668 zero

          Exhibit 6-6
The life expectancy of a particular brand of tire is normally distributed with a mean of 40,000 and a standard deviation of 5,000 miles.
Refer to Exhibit 6-6. What is the probability that a randomly selected tire will have a life of exactly 47,500 miles?
0.4332
0.9332
0.0668
zero

Added by Cameron W.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Hoan Nguyen

02/20/2024

Step 1

The z-score is calculated as: z = (X - μ) / σ where X is the value we're interested in (47,500 miles), μ is the mean (40,000 miles), and σ is the standard deviation (5,000 miles). Show more…

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Exhibit 6-6: The life expectancy of a particular brand of tire is normally distributed with a mean of 40,000 miles and a standard deviation of 5,000 miles. Refer to Exhibit 6-6. What is the probability that a randomly selected tire will have a life of exactly 47,500 miles? 0.4332 0.9332 0.0668 zero