Accession Number:

AD0266356

Title:

IRREGULAR FRACTIONS OF FACTORIAL EXPERIMENTS

Descriptive Note:

Corporate Author:

IOWA STATE UNIV OF SCIENCE AND TECHNOLOGY AMES STATISTICAL LAB

Personal Author(s):

Report Date:

1961-02-01

Pagination or Media Count:

1.0

Abstract:

The development of fractional plans which consist of irregular fractions of factorial experiments is presented. The plans found to be of greatest practical value are the 32 to the M power replicate plans for the 2 to the N power experiment. Although these plans introduce correlations between some of the estimates, the correlations do not affect individual tests on the parameters. Irregular fraction plans often permit the estimation of main effects and two-factor int ractions with fewer trials than is required with a plan which yields uncorrelated estimates of these parameters. The irregular fraction plans permit a simple procedure for obtaining estimates of the main effects and interactions of interest together with estimates of their variances, covariances and correlation coefficients. Examples of 32 to the M power replicate plans for the 2 to the N power experiment are presented. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE