Accession Number:

AD0611142

Title:

WHIRLPOOL, A COMPUTER PROGRAM FOR 'SORTING OUT' INDEPENDENT VARIABLES BY SEQUENTIAL MULTIPLE LINEAR REGRESSION,

Descriptive Note:

Corporate Author:

NORTHWESTERN UNIV EVANSTON ILL

Report Date:

1964-01-01

Pagination or Media Count:

54.0

Abstract:

The problem of identifying those variables in some larger set that exert most control on a given dependent variable is encountered in many earth-science problems. A variety of methods is available for ranking independent variables in the order of their importance, and the procedure described here is based on a straightforward leastsquares use of the general linear model. The method consists in taking the independent variables one at a time, two at a time, and so on, until all possible combinations are included. Thus, no assumptions are made about the significance of any variable or combination of variables the full output is presented to facilitate substantive evaluation. The program is designed as a data-search procedure, although it can be modified to include F tests and similar aspects of more formal statistical analysis if desired. This report describes the mathematical procedures involved, it illustrates the method with a geological example, and it includes instructions for program operation. A Fortran II listing of the program is given in an Appendix. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE