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Growth: multi-group pretest/postest &... |
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Ilona posted on Friday, September 03, 2010 - 5:54 am
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Hi, I would like to analyze data with these conditions and sample sizes with nonrandom group assignments: Sample (in a single grade level): Clusters of about 20 students per classroom Clusters of about 4 classrooms per school Clusters of about 5 schools per district =Total of about 400 students per district There are two similar districts: District 1 gets treatment (400 students) District 2 is control (400 students) All students in both districts get a pretest and posttest. Purpose 1: Want to see if growth from pretest to posttest is greater for treatment district than control district overall. Purpose 2: Want to see if growth from pretest to posttest is greater for treatment district than control district. Wish to examine this effect separately by race of students (Black/White). And if possible: Wish to examine differences in growth trajectories based on initial pretest score. (I.e., wish to view growth trajectory differences by pretest scores overall, and pretest scores by race.) ------------------------------------ Please advise on best method, plus references to guide me with this. Thank you! -Ilona |
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This is a general analysis question that is more appropriate for Multilevelnet. See the Raudenbush and Bryk book as a reference. |
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