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  • 14-05-2023
  • Mathematics
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A researcher, using data on class size (CS) and average test scores from 100 third-grade classes, estimates the OLS regression: TestScore = 520.4 - 5.82.CS, R2 = 0.08, SER = 11.5 What is the sample standard deviation of test scores across the 100 classrooms? (Hint: Review the formulas for the R2 and SER).

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