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Educational and Psychological Measurement
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The Power of Hypothesis Tests for Comparisons

Robert M. McFatter

University of Southwestern Louisiana

Harry F. Gollob

University of Denver

Correct simple formulas are provided for the value of 0 needed to use the commonly available Pearson and Hartley (1951) power charts in determining the power of hypothesis tests involving single degree-of-freedom comparisons in the fixed effects analysis of variance. Most experimental design textbooks do not present such formulas; two widely used texts that do give them present incorrect ones.

Educational and Psychological Measurement, Vol. 46, No. 4, 883-886 (1986)
DOI: 10.1177/001316448604600408
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