A statistics student is wondering if the fuel economy for pickup trucks is different based on the year the truck was manufactured.Independent random samples of the fuel economies for even model year trucks between 2008 and 2016 are located in columns 8-12.

1. Are the fuel economies significantly different (at 1% level of significance)?
2. What graph would you include to support your decision in part a?Explain, in detail, how it supports the decision.

2008 2010 2012 2014 2016 16 15 14 17 17 15 14 15 17 17 14 14 16 15 18 14 15 15 17 17 14 16 16 14 18 17 14 16 16 18 15 15 15 16 20 16 15 16 17 19 15 16 16 16 17 15 15 "" 16 17 "" 16 "" 16 "" "" 14 "" 17 ""