2. These results come from the tscores_05.dta data set you used in your problem set. Below is a regression of school level test scores (tscores) on the percent of students in the school that are eligible for free meals (pfmeals). a. Interpret the coefficient on pfmeals (mathematically and statistically). b. Do you think the coefficient on the percent of students in the school that are eligible for free meals (pfmeals) is the "right" coefficient (i.e., is it unbiased or causal)? Why or why not? c. Calculate the Residual Sum of Squares. • reg tscore pfmeals Source df MS Number of obs 4,889 F(1, 4887) 12921.42 Model 288035.863 1 288035.863 Prob > F 0.0000 Residual 4,887 22.2913505 R-squared Adj R-squared 0.7255 Total 396973.693 4,888 81.2139307 Root MSE 4.7214 tscore Coef. Std. Err. P>|t| [95% Conf. Interval]

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