A longitudinal study experimentally evaluating the impacts of class size in early education on various outcomes (Mosteller, 1995)
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A data frame with 1911 observations and 14 variables:
A binary treatment indicating whether a student is assigned to small class and regular class without an aid
A continous variable measuring student's writing scores
A continous variable measuring student's reading scores
A continous variable measuring student's math scores
Students' gender
Students' race
Students' birth month
Students' birth year
Urban or rural
Enrollment size
Grade range
Number of students on free lunch
Number of students on school buses
Percentage of white students