Solved: Suppose the distribution of ages of cars on us roads is, Basic Statistics

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Suppose the distribution of ages of cars on us roads is

Question: The Polk Company reported that the average age of a car on U.S. roads in a recent year was 7.5 ars. Suppose the distribution of ages of cars on U.S. roads is approximately bellshaped. If 99.7% of the ages are between 1 year and 14 years, what is the standard deviation of car age? Suppose the standard deviation is 1.7 years and the mean is 7.5 years. Between what two values would 95% of the car ages fall?

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Basic Statistics: Suppose the distribution of ages of cars on us roads is

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