Umass Dept. of Biostatistics and Epidemiology  Research
Improving Analysis Methods for Clustered Randomized Primary Prevention Intervention Trials
BioEpi :
Cluster Home
Contacts : Other Links


Current Topics
Dialogues/Comments
Outline
Introduction
  Exchangeability
Superpopulations
Single-stage Samp.
Two-stage Samp.
Estim. Domains
One Factor Study
Response Error
Mixed Models
Foundations of Stat.
Results
Intranet
Bibliography

One Factor Study
 

Inference for a one-way factorial experiment

Synopsis:

We develop estimating equations for Factor Level means in a completely randomized one way factorial experiment. This development closely parallels the development for cluster means in two-stage sampling when all clusters are selected at the first stage (see c00ed52.doc). We assume the factor has H levels that correspond to H distinct treatments, and refer to a distinct factor level as a treatment. Each treatment is potentially assigned to each of M=Hm subjects in a population. The experiment consists of randomly assigning m subjects to each treatment (with each subject receiving only one treatment), and then observing a response. Thus, the response can potentially be observed on any of the treatment-subject combinations. The solution given is general, and there are no examples or applications..

  Contents: Introduction
A superpopulation framework for treatment means
Population parameters and models for the superpopulation
Expected value and variance of the superpopulation
Sampling, re-arranging, adn partitioning
Estimation
Constructing the estimating equations
Simplifications of the estimating equations
  Print: 12 pages ; 6/8/00 ; c00ed54.doc
  Author: Ed Stanek and Elaine Puleo; Reviewer: none
  Related:  

The expected value and variance of a superpopulation for a one way factorial experiement

Synopsis:

We develop expressions for the expected value and variance in a one way factorial model. These expressions are derived for the superpopulation vector in the context of a one factor study. The factor has H levels that correspond to H distinct treatments. Each treatment is potentially assigned to each of M=Hm subjects in a population. The experiment consists of randomly assigning m subjects to each treatment (with each subject receiving only one treatment), and then observing a response.

  Contents: Definition of the population and superpopulation
Expected value and variance of the superpopulation
  Print: 19 pages ; 6/5/00 ; c00ed55.doc
  Author: Ed Stanek, Elaine Puleo; Reviewer: none
  Related:  

Cluster Home

TOP
: Outline :

University of Massachusetts at Amherst Copyright 2000 University of Massachusetts, Amherst.
This is a page at the University of Massachusetts Amherst Campus.
Produced and maintained in the Dept. of Biostatistics and Epidemiology at the School of Public Health and Health Sciences.
Send comments or questions about this web site to
Webmaster : Oscar Loureiro at oscar@math.umass.edu
This page was last modified on October 17, 2003.