Table 1: Differences Estimates of Effect on Standardized Test Scores of Class Si
ID: 3065550 • Letter: T
Question
Table 1: Differences Estimates of Effect on Standardized Test Scores of Class Size Treatment Group Grade Regressor 13.11* (2.47) 0.31 (2.27) 918.04* 29.52* (2.83) 11.96 (2.65) 1039.39* 19.42* (2.75) 3.48 (2.54) 1157.81* 15.59* (2.33) 0.29 (2.27) Small class Regular size with aide Intercept Number of observations 1228.51 5786 6379 6049 5967 Note: The dependent variable is the student's combined score on the math and reading portions of an achievement test. Standard errors are given in parentheses under the coefficients. ** The individual coefficient is statistically significant at the 1ó 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, ignore 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 points on the test. (Round your response to two decimal places.) Standard error-1-(Round your response to two decimal places.) The 95% confidence interval-CD (Round your responses to two decimal places.)Explanation / Answer
Result:
For kindergarten
Estimated treatment effect for small class = 13.11
Standard error = 2.47
t critical value for 95% confidence interval (df= 5783)= 1.96
Confidence interval = ±t*se
Lower limit = 13.11-1.96*2.47 = 8.2688
upper limit = 13.11+1.96*2.47 = 17.9512
95% CI = (8.27, 17.95)
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