Suppose that a​ researcher, using data on class size ​(CS​) and average test scores from ​third-grade classes, estimates the OLS regression ​+ CS​, ​= ​, SER​ = ​(​) ​(​) Construct a​ 95% confidence interval for ​, the regression slope coefficient. The​ 95% confidence interval for ​, the regression slope​ coefficient, is ​( nothing​, nothing​). ​(Round your responses to two decimal places.​) The ​t-statistic for the​ two-sided test of the null hypothesis ​: ​= is nothing. ​(Round your response to four decimal places.​) ​Note: Assume a normal distribution. The p​-value for the​ two-sided test of the null hypothesis ​: ​= is nothing. ​(Round your response to four decimal places.​) Do you reject the null hypothesis at the ​% ​level? A. ​, because the p​-value is than 0.01. B. ​Yes, because the t​-statistic is less than 2.58. C. ​Yes, because the t​-statistic is greater than 2.58. D. ​, because the ​p-value is than 0.01. The p​-value for the​ two-sided test of the null hypothesis ​: ​= is nothing. ​(Round your response to four decimal places.​) Without doing any additional​ calculations, determine whether is contained in the​ 95% confidence interval for . A. ​No, is not contained in the​ 95% confidence interval for . B. ​Yes, is contained in the​ 95% confidence interval for . The​ 99% confidence interval for is ​( nothing​, nothing​). ​(Round your responses to one decimal place.​)