Bob Shepperd is trying to forecast 10-year T-bond yield. Shepperd tries a variety of explanatory variables in several iterations of a single-variable model. Partial results are provided below (note that these represent three separate one-variable regressions): The critical t-value at 5% level of significance is equal to 2.02 . 1. For the regression model involving inflation as the explanatory variable, the confidence interval for the slope coefficient is closest to A. -0.27 to 2.43 . B. 0.26 to 2.43 . C. -2.27 to 2.43 . D. 0.22 to 1.88 . 2. For the regression model involving unemployment rate as the explanatory variable, what are the results of a hypothesis test that the slope coefficient is equal to 0.20 (vs. not equal to 0.20 ) at 5% level of significance? A. The coefficient is not significantly different from 0.20 because the p-value is