Accession Number : AD0431642


Title :   A PAIR OF NONPARAMETRIC INDICES OF AGREEMENT AND DISAGREEMENT,


Corporate Author : ARMY MEDICAL RESEARCH LAB FORT KNOX KY


Personal Author(s) : Cronholm, James N


Report Date : 09 Nov 1963


Pagination or Media Count : 38


Abstract : A new nonparametric index of agreement, A, and its complement, D = 1- A, an index of disagreement, based on multiple agreements and disagreements, are described. These statistics are compared with a pair of complementary indices, alpha and delta= 1-a, based on pairwise agreements and disagreements. Expressions for A and D are presented and their sampling distributions, expected values, biases, sampling variances, and limiting forms are derived. Tables of sampling probabilities, significantly extreme values, expected values, and standard errors are presented for A, D, alpha and delta. An example is given and the statistics are interpreted. A and D are compared with the pairwise indices with respect to several sampling properties. The proposed indices of agreement and disagreement, A and D, should prove useful as nonparametric measures of reliability and discrimination. (Author)


Descriptors :   *PROBABILITY , *STATISTICAL DISTRIBUTIONS , RELIABILITY , ERRORS , POLYNOMIALS , SAMPLING , TABLES(DATA) , STATISTICAL ANALYSIS


Distribution Statement : APPROVED FOR PUBLIC RELEASE