The table shows the number of wins and the number of strike-outs (SO) for 40
baseball pitchers in the major leagues in 2011 . (Source: 2011 MLB PITCHING
STATS, http://www .baseball-reference.com/leagues/MLB/2011-pitching-
leaders.shtml, accessed via StatCrunch. Owner: IrishBlazeFighter)
a. Make a scatterplot of the data, and state the sign of the slope from the
scatterplot. Use strike-outs to predict wins.
b. Use linear regression to find the equation of the best-fit line. Insert the
line on the scatterplot using technology or by hand.
c. Interpret the slope.
d. Interpret the intercept and comment on it.
$$
\begin{aligned}
&\begin{array}{|c|c|}
\hline \text { Wins } & \text { SOs } \\
\hline 21 & 248 \\
\hline 19 & 220 \\
\hline 17 & 238 \\
\hline 24 & 250 \\
\hline 18 & 198 \\
\hline 13 & 139 \\
\hline 13 & 220 \\
\hline 14 & 194 \\
\hline 16 & 225 \\
\hline 11 & 146 \\
\hline 21 & 198 \\
\hline 12 & 179 \\
\hline 13 & 175 \\
\hline 15 & 178 \\
\hline 16 & 206 \\
\hline 13 & 117 \\
\hline 19 & 230 \\
\hline 13 & 161 \\
\hline 16 & 197 \\
\hline 16 & 192 \\
\hline
\end{array}\\\
&\begin{array}{|c|c|}
\hline \text { Wins } & \text { SOs } \\
\hline 12 & 158 \\
\hline 13 & 191 \\
\hline 16 & 158 \\
\hline 8 & 134 \\
\hline 10 & 197 \\
\hline 9 & 123 \\
\hline 9 & 96 \\
\hline 11 & 178 \\
\hline 14 & 111 \\
\hline 14 & 126 \\
\hline 11 & 191 \\
\hline 14 & 222 \\
\hline 9 & 185 \\
\hline 15 & 182 \\
\hline 16 & 169 \\
\hline 11 & 166 \\
\hline 12 & 218 \\
\hline 13 & 126 \\
\hline 17 & 207 \\
\hline 13 & 158 \\
\hline
\end{array}
\end{aligned}
$$