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COEFFICIENT OF CORRELATION 125 THE POINT BISERIAL COEFFICIENT OF CORRELATION BY JOSEPH LEV New York State Department of Civil Service The product. swer, point, biserial correlation coefficient was. calculated to measure the validity of the item. The point biserial coefficient correlation was. computing A chart the point for correlation biserial coefficient. Dingman. Harvey Psychometrika, 1954, 19, vol. issue pages 3, In 257-259. particular, a of way deriving Asp converter the point correlation coefficient from bi-serial summary statistics (means, deviations standard and sample

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