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Peer reviewedAlgina, James; Seaman, Samuel – Educational and Psychological Measurement, 1984
A simple formula for calculating semipartial correlations is presented and illustrated. (Author)
Descriptors: Correlation, Mathematical Formulas, Regression (Statistics)
Peer reviewedAlgina, James; Olejnik, Stephen F. – Educational and Psychological Measurement, 1984
The Welch-James procedure may be used to test hypothesis on means, when independent samples from populations with heterogenous variances are available. Summation formulas for the Welch-James procedure are presented for the 2x2 design. Matrix formulas that permit routine application of the procedure to crossed factorial designs are presented.…
Descriptors: Analysis of Variance, Hypothesis Testing, Mathematical Formulas, Matrices
