The phimax adjustment to phi (Pearson's product moment correlation applied to binary data) is explored. Phi/phimax is shown to be a measure of relationship apart from its affiliation with phi. The relations between phi/phimax and kappa and limitations of phi/phimax are discussed. (SLD)

This study developed a robust linear regression technique based on the idea of weighted least squares. In this technique, a subsample of the full data of interest is drawn, based on a measure of distance, and an initial set of regression coefficients is calculated. The rest of the data points are then taken into the subsample, one after another,…

The iterative expanding reweighted least squares (IERLS), a weighted-least-squares robust regression procedure, is developed and compared with Huber's M estimator (P. Huber, 1973), the Least Absolute Deviations, the Least Median of Squares, and the Ordinary Least Squares. Data with various outliers contamination were simulated and analyzed. The…