Regression Analysis: Avg. Tot. Score versus %Takers, T/S Ratio
Model Summary
S R-sq R-sq(adj) R-sq(pred)
34.2385 79.91% 79.06% 76.83%
Coefficients
Term Coef SE Coef T-Value P-Value VIF
Constant 1118.5 39.5 28.34 0.000
%Takers -2.547 0.187 -13.62 0.000 1.05
T/S Ratio -3.73 2.21 -1.69 0.098 1.05
1. What are the degrees of freedom associated with the t tests of the slopes?
A) 46
B) 47
C) 48
D) 49
E) 50
2.Under what conditions are the computed p-values for these tests valid?
3. Assuming those conditions are satisfied, which of the following gives a correct interpretation of the p-value of T/S Ratio?
A) At the 10% significance level, T/S Ratio is a significant linear predictor.
B) At the 10% significance level, T/S is a significant linear predictor in combination with %Takers.
C) At the 5% significance level, T/S Ratio is not a significant linear predictor in combination with %Takers.
D) Both b and c.
Please explain how you arrived to each of the answers. Thanks!