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EducationEducational PsychologyHigher EducationDistance EducationE-learningOnline Higher EducationDistance LearningOnline AssessmentOnline InstructionOnline LearningOnline Student EngagementFinal Course GradesLearning Outcome AnalysisObservational Study EvaluationOnline Course QualityOnline Student GraduationOnline Student PersistenceOnline Student RetentionOnline Student Success
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Statistical Power Analysis for the Behavioral Sciences
Keith E. Muller · Technometrics · 1989 · 16.5K citations