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Ho, Andrew D.; Yu, Carol C. – Educational and Psychological Measurement, 2015
Many statistical analyses benefit from the assumption that unconditional or conditional distributions are continuous and normal. More than 50 years ago in this journal, Lord and Cook chronicled departures from normality in educational tests, and Micerri similarly showed that the normality assumption is met rarely in educational and psychological…
Descriptors: Statistics, Scores, Statistical Distributions, Tests