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Technical Methods Report: Statistical Power for Regression Discontinuity Designs in Education Evaluations

NCEE 2008-4026
August 2008

Tables

Table 4.1 Formulas for TS ρ Under RD Designs, by Score Distribution
Table 4.2 Design Effects for RD Designs, by Score Distribution, the Location of the Cutoff Score Value, and Other Key Parameters
Table 4.3 Design Effects for RD Designs for a 50-50 Split of the Treatment and Control Group Samples
Table 7.1 Required School Sample Sizes to Detect Target Effect Sizes, for Various RD Designs
Table 7.2 Required School Sample Sizes to Detect Target Effect Sizes, for Various RD Designs
Table 7.3 Required School Sample Sizes to Detect Target Effect Sizes, for Various Random Assignment (RA) Designs
Table A.1 Values for Factor(.) in Equation (1) of Text, by the Number of Degrees of Freedom, for One- and Two-Tailed Tests, and at 80 and 85 Percent Power