An Extension of Cochran's Test for Homogeneity of Variances

Abstract

Cochran's test for equality of k normal population variances consists of comparing the largest of the set of k sample variances, all based on the same number of degrees of freedom n, with the sum of the sample variances. More generally, it may sometimes be advantageous to compare the m-th largest sample variance with the total. Keywords: Control charts, Process control, Quality control, Stability of variance, Statistical data tables.

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Document Details

Document Type
Technical Report
Publication Date
Aug 08, 1989
Accession Number
ADA211054

Entities

People

  • H. Solomon
  • M. A. Stephens

Organizations

  • Stanford University

Tags

Communities of Interest

  • Cyber
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Data Analysis
  • Data Science
  • Data Sets
  • Distribution Theory
  • Harmonic Analysis
  • Information Science
  • Military Research
  • Order Statistics
  • Probability
  • Quality Control
  • Random Variables
  • Statistical Data
  • Statistics
  • United States
  • United States Government
  • White Noise

Fields of Study

  • Education
  • Mathematics

Readers

  • Regression Analysis.
  • Statistical inference.