K 13.02** Table 1: Differences Estimates of Effect on Standardized Test Scores of Class Size Treatment Group Regressor Grade 1 2 3 29.95** 19.95** 15.58 Small class (2.44) (2.82) (2.78) (2.37) 0.31 11.96 3.48 -0.29 Regular size with aide Intercept Number of observations (2.27) 918.04** (1.63) 5786 (2.65) 1039.39** (2.54) 1157.81** (2.27) 1228.51** (1.78) (1.82) (1.68) 6379 6049 5967 Note: The dependent variable is the student's combined score on the math and reading portions of an achievement lest. Standard errors are given in parentheses under the coefficients. ** The individual coefficient is statistically significant at the 1% significance level using a two-sided test. Using the results in the table above, calculate the following for each grade: an estimate of the small class treatment effect, relative to the regular class; its standard error; and its 95% confidence interval. (For this exercise, gnore the results for regular classes with aides.) For students in kindergarten: The estimated small class treatment effect relative to being in a regular class is an increase of 13.02 points on the lest. (Round your response to two decimal places.) Standard error=2.44. (Round your response to two decimal places.) The 95% confidence interval = (8.24, 17.802). (Round your responses to two decimal places.) For students in grade 1: The estimated small class treatment effect relative to being in a regular class is an increase of (Round your response to two decimal places.) Standard error (Round your response to two decimal places.) The 95% confidence interval = ( ). (Round your responses to two decimal places.) points on the test