Suppose that a researcher, using data on class size (CS) and average test scores from 103 third-grade classes, estimates the OLS regression TestScore = 546.420 + ( − 6.1110) × CS, R² = 0.07, SER = 12.1. A classroom has 22 students. The regression's prediction for that classroom's average test score is 411.98. (Round your response to two decimal places.) Last year a classroom had 19 students, and this year it has 23 students. The regression's prediction for the change in the classroom average test score is - 24.44. (Round your response to two decimal places.) The sample average class size across the 103 classrooms is 22.47. The sample average of the test scores across the 103 classrooms is OLS estimators.) (Round your response to two decimal places.) (Hint: Review the formulas for the

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