The Polk Company reported that the average age of a car on U S roads in a recent year was 7 5 years Suppose the distribution of ages of cars on U S roads is approximately bell shaped If 99 7 of the ages are between 1 year and 14 years, what is the standard deviation of car age Suppose the standard ...

75 Each of the numbers 1 and 14 are 65 units away from ...

The Polk Company reported that the average age of a car on U.S. roads in a recent

Question:

The Polk Company reported that the average age of a car on U.S. roads in a recent year was 7.5 years. Suppose the of ages of cars on U.S. roads is approximately bell shaped. 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?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...