In this multiple regression output summary, Beta-2 is:

D E FGH K SUMMARY OUTPUT \begin{tabular}{l|r} \hline \multicolumn{2}{c}{ Regression Statistics } \\ \hline Multiple R & 0.857 \\ \hline R Square & 0.734 \\ \hline Adjusted R Square & 0.703 \\ \hline Standard Error & 5.366 \\ \hline Observations & 20 \\ \hline \end{tabular} ANOVA \begin{tabular}{l|r|r|r|r|rr} \hline & Coefficients & Standard Error & \multicolumn{1}{c}{t Stat } & P-value & Lower 95\% & Upper 95\% \\ \hline Intercept & 67.67 & 2.82 & 24.03 & 0.00 & 61.73 & 73.61 \\ \hline hours & 5.56 & 0.90 & 6.18 & 0.00 & 3.66 & 7.45 \\ \hline prep_exams & 0.60 & 0.91 & 0.66 & 0.52 & 2.53 & 1.33 \\ \hline \end{tabular}