Accession Number : AD0415002

Title :   ON THE COMPARISON OF THE MEANS OF TWO POPULATIONS WITH UNKNOWN VARIANCES.

Descriptive Note : Final rept. Sep 61-June 62,

Corporate Author : CARNEGIE INST OF TECH PITTSBURGH PA

Personal Author(s) : Yao,Ying

Report Date : JUN 1963

Pagination or Media Count : 54

Abstract : Tis is a study of the problem of the comparison of the means of two populations with unknown variances using the method of ''Approximate Degrees of Freedom.'' A modified version of the Welch method is given for the univariate situation, and an extension is given for the general multivariate situation. These methods are then compared with the asymptotic series solution with respect to their significance levels. (Author)

Descriptors :   (*STATISTICAL ANALYSIS, STATISTICAL DISTRIBUTIONS), (*ANALYSIS OF VARIANCE, SAMPLING), SERIES(MATHEMATICS), PROBABILITY, STATISTICAL FUNCTIONS, LEAST SQUARES METHOD, INEQUALITIES, NUMERICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE