J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J. Anim Sci. 1980. 50:1051-1056.
© 1980 American Society of Animal Science
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gianola, D.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Gianola, D.

Confidence Intervals for Ratios of Linear Functions of Mixed Models with Reference to Animal Breeding Data

Daniel Gianola1

University of Illinois, Urbana 61801

Abstract

Mixed linear models are widely used in animal breeding experiments from which estimates of ratios are desired. This paper presents methods for the development of exact confidence intervals for ratios of linear functions of fixed effects in mixed models. Approximate confidence intervals for ratios involving random effects can also be obtained by these methods. Additional problems considered include pooled ratio estimation from multiple data sets with constant variance and the case of unequal error variance with two sources of heterogeneity. Confidence intervals obtained here are expected to be larger than those based on approximations of the variance of a ratio through Taylor's series, since the latter underestimate the true variance under certain conditions.

Footnotes

2 Dept. of Anim. Sci.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1980 by the American Society of Animal Science.