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Ludlow, Larry H. – Educational and Psychological Measurement, 1987
In the process of fitting a quantitative synthesis model, the assumption of homogeneous effect size variation is assessed via omnibus test statistics. Graphical representations of data on techniques for teaching composition skills are used to help determine the extent to which sample estimates deviate from modeled population estimates. (TJH)
Descriptors: Graphs, Mathematical Models, Sample Size, Statistical Analysis