A San Jose State Student Collects Data from 20 Students

Essay

A San Jose State student collects data from 20 students. He compares the number of classes a student is enrolled in to their GPA. Here are the results of the regression analysis. The conditions for inference are satisfied.
Simple linear regression results: Dependent Variable: GPA Sample size: 20
R-sq = 0.26753742 s: 0.45747


$\begin{array}{|l|r|r|r|r|}\hline\text{ Coefficient } &\text{ Estimate } &\text{ Std. Err. } &\text { T-Stat } &\text { P-Value } \\\hline \text { Constant }& 3.4246 & 0.16580 & 20.654 & <0.0001 \\\hline \text { No. of Classes} & -0.13940 & 0.054369 & -2.5641 & 0.0195 \\\hline\end{array}$

-Find and interpret a 95% confidence interval for the slope of the regression equation.