Suppose that a researcher, using data on class size (CS) and average test scores from 100 third-grade classes, estimates the OLS regression TestScore= 494.3800 + (-5.5290) x CS, R- =0.07, SER = 10.9 (19.3800) (2.0553) Construct a 95% confidence interval for P. , the regression slope coefficient. The 95% confidence interval for P, , the regression slope coefficient, is (Round your responses to two decimal places.)