(Requires Appendix Material from Chapters 4 and 5)Shortly Before You

Essay

(Requires Appendix material from Chapters 4 and 5)Shortly before you are
making a group presentation on the testscore/student-teacher ratio results, you
realize that one of your peers forgot to type all the relevant information on one of
your slides.Here is what you see: $$\begin{array} { r l r } \widehat { \text { TestScore } } = & 698.9 - \text { STR } & R ^ { 2 } = 0.051 , \text { SER } = 18.6 \\& ( 9.47 ) ( 0.48 ) &\end{array}$$ In addition, your group member explains that he ran the regression in a standard
spreadsheet program, and that, as a result, the standard errors in parenthesis are
homoskedasticity-only standard errors.
(a)Find the value for the slope coefficient.