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Eval11 Poster 55: Visualizing Significance

Which criteria should be used to select higher performing schools?...Examples will be based on a value-added model which attempts to identify schools that stand out on measured student achievement

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Focus Search - [image: NCEA & ACT logo JPEG.jpg]( The standard error of the school effect size is highly dependent on the number of grade-levels. ) ( Standard Error ) ( Number of Students in the Analysis )[image: ] [bookmark: IDX] ( More students or grade-levels and higher significance levels lead to higher power to detect a true effect size. ) ( Power ) ( Number of Students in the Analysis )[image: ][image: Page_Title_Bar.png] ( Number of Students in the Analysis )Since smaller schools are more variable, is this biased towards smaller schools?