A driver has recorded and posted on the Internet (www.randomuseless.info/gasprice/gasprice.html) the price he paid for gasoline at

Question:

A driver has recorded and posted on the Internet (www.randomuseless.info/gasprice/gasprice.html) the price he paid for gasoline at every purchase from 1979 to 2012. Since 1984 all purchases were self-serve and all were for premium (92-93Octane) gas. He has also standardized the prices to April 1979 dollars. Here are box-plots for 2003, 2006, 2009, and 2012:

a) Compare the distribution of prices over the four years.
b) In which year were the prices least stable (most vola-tile)? Explain.

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...