
Accession Number : AD0717604
Title : The Distribution of Certain Regression Statistics.
Descriptive Note : Technical rept.,
Corporate Author : WISCONSIN UNIV MADISON DEPT OF STATISTICS
Personal Author(s) : Draper,N. R. ; Guttman,I. ; Kanemasu,H.
Report Date : AUG 1970
Pagination or Media Count : 14
Abstract : There are a number of variable selection procedures in current use in multiple regression analysis. In some of these procedures, a new variable is entered into regression when its contribution to the explanation of the response is larger than that of any other variable not yet entered. The new entrant is then tested by a standard Ftest to see if its contribution is 'significant'. Because of the method of selecting the largest contributor, an Ftest of this type cannot be theoretically correct but the procedure is used because the exact distributions are not known. This raises questions like 'Is one seriously in error in using the Ftests.' 'If so, can adjustments be made to the Ftest to correct the difficulty.' The purpose of this paper is to discuss some new results which throw light on these questions. (Author)
Descriptors : (*REGRESSION ANALYSIS, STATISTICAL DISTRIBUTIONS), STATISTICAL TESTS, SELECTION
Subject Categories : Statistics and Probability
Distribution Statement : APPROVED FOR PUBLIC RELEASE