TESTING EQUALITY OF MEANS AFTER A PRELIMINARY TEST OF EQUALITY OF VARIANCES

Abstract

IN TESTING EQUALITY OF MEANS OF TWO Normal populations, Student's t-test is not generally applicable when the variances of the two populations may be unequal and their ratio unknown. A procedure is considered whereby a preliminary test is performed to ascertain whether or not the variances may be regarded as equal. On the basis of the outcome of this preliminary test, one proceeds to test for equality of means. Tables of size and power are included to indicate the behavior of the proposed tests. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1961
Accession Number
AD0269325

Entities

People

  • J. Gurland
  • R.s. Mccullough

Organizations

  • University of Wisconsin–Madison

Tags

DTIC Thesaurus Topics

  • Computing-Related Activities
  • Data Science
  • Information Science
  • Interdisciplinary Science
  • Mathematical Analysis
  • Mathematics
  • Statistical Analysis

Fields of Study

  • Mathematics

Readers

  • Regression Analysis.