4. Compare variances (or standard deviations)
As with comparisons of averages, comparisons of variances are used to determine whether two batches of parts have identical variabilities, or whether two operators or two laboratories find results with statistically different dispersions when measuring the same entity.
4.1 Comparison of a variance with a limit under the assumption of normality
To compare a theoretical variance
The Ultimate Scientific and Technical Reference
This article is included in
Laboratory quality and safety procedures
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Compare variances (or standard deviations)
Test an assumed probability distribution for the parent distribution
Bibliography
Statistique théorique et appliquée , 2nd edition, Dagnelie P, De Bœck Université, 2007
Introductory Statistics with R , Dalgaardp, Springer, 2008
Statistics, theory and applications , Lejeune M, Springer, 2004
Applied Statistices and Probability for Engineers , 4th edition, Montgomery D.C & Runger...
Tool
The Ultimate Scientific and Technical Reference
