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Power Calculation for Independent Samples Hotelling's T2 Using PROC IML IN SAS.
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Algina, James; Hombo, Catherine M. – Educational and Psychological Measurement, 1998
The Statistical Analysis System (SAS) has been used to program power calculations for the independent samples Hotellings T squared. Three programs have been prepared to accommodate variations in the information that may be available to do the power analysis. (Author/SLD)
Descriptors: Computer Oriented Programs, Power (Statistics), Sampling
Stepwise Analyses Should Never Be Used by Researchers.
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Lockridge, Jewel – 1997
Researchers persist in using stepwise regression in spite of problems with this approach. As noted by B. Thompson (1995), three problems accompany the use of stepwise applications. The first is that computer packages may use incorrect degrees of freedom in their computations, resulting in a greater likelihood of obtaining a spurious statistical…
Descriptors: Computer Oriented Programs, Error of Measurement, Predictor Variables, Research Methodology