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A researcher wanted to know if color worsens children's reading scores (by way of creating distraction). She used blue color papers for the reading test;
A researcher wanted to know if color worsens children's reading scores (by way of creating distraction). She used blue color papers for the reading test; she was able to recruit all students from third grade. Determine the cut-off z-statistic for determining whether the cohort really did perform worse. Use p=.04
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