In 2001, the Arizona Diamondbacks Defeated the New York Yankees

In 2001, the Arizona Diamondbacks defeated the New York Yankees in the Baseball
World Series in 7 games.Some players, such as Bautista and Finley for the
Diamondbacks, had a substantially higher batting average during the World Series than
during the regular season.Others, such as Brosius and Jeter for the Yankees, did
substantially poorer.You set out to investigate whether or not the regular season batting
average is a good indicator for the World Series batting average.The results for 11
players who had the most at bats for the two teams are: $$\begin{array} { l } \widehat { A Z W \text { savg } } = - 0.347 + 2.290 \text { AZSeasavg } , R ^ { 2 } = 0.11 , \text { SER } = 0.145 , \\\\\widehat { N Y W \text { savg } } = 0.134 + 0.136 \text { NYSeasavg } , R ^ { 2 } = 0.001 , \text { SER } = 0.092 ,\end{array}$$ where Wsavg and Seasavg indicate the batting average during the World Series and the
regular season respectively.
(a)Focusing on the coefficients first, what is your interpretation?