The distribution of the ages of the winners of the Tour de France from 1903 to 2012

Question:

The of the ages of the winners of the Tour de France from 1903 to 2012 is approximately bell-shaped. The mean age is 28.1 years, with a standard deviation of 3.4 years. In Exercises 45,
(a) Transform the age to a z-score,
(b) Interpret the results,
(c) Determine whether the age is unusual.

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...