Question

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: TestScore = 698.9 - STR, R = 0.051, SER =18.6 SE: for intercept(9.47) and coefficient(0.48). 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

Answer 1

We have the following information in the slides:

TestScore = 698.9 - STR, R = 0.051, SER =18.6 SE: for intercept(9.47) and coefficient(0.48).

Here the regression equation is TestScore = 698.9 - STR.

Hence the value of the slope coefficient of student-teacher ratio variable is -1.