Tour de France 2007.
We met the Tour de France data set in Chapter 2 (in Just Checking). One hundred years ago, the fastest rider finished the course at an average speed of about 25.3 kph (around 15.8 mph). In 2005, Lance Armstrong averaged 41.65 kph (25.88 mph) for the fastest average winning speed in history.
a) Make a scatterplot of Avg Speed against Year. Describe the relationship of Avg Speed by Year, being careful to point out any unusual features in the plot.
b) Find the regression equation of Avg Speed on Year. c) Are the conditions for regression met? Comment.