Answer Happy

Suppose that a researcher, using data on class size (CS) and average test scores from 103 third-grade classes, estimates the OLS regression TestScore = 567.236 + ( − 6.3438) × CS, R² = 0.11, SER = 12.5. A classroom has 21 students. The regression's prediction for that classroom's average test score is 434.0162. (Round your response to two decimal places.) Last year a classroom had 18 students, and this year it has 22 students. The regression's prediction for the change in the classroom average test score is - 25.38. (Round your response to two decimal places.) The sample average class size across the 103 classrooms is 23.33. The sample average of the test scores across the 103 classrooms is 419.24. (Hint: Review the formulas for the OLS estimators.) (Round your response to two decimal places.) The sample standard deviation of test scores across the 103 classrooms is place.) (Hint: Review the formulas for the R² and SER.) (Round your response to one decimal