JSM 2004 - Toronto

Abstract #301190

This is the preliminary program for the 2004 Joint Statistical Meetings in Toronto, Canada. Currently included in this program is the "technical" program, schedule of invited, topic contributed, regular contributed and poster sessions; Continuing Education courses (August 7-10, 2004); and Committee and Business Meetings. This on-line program will be updated frequently to reflect the most current revisions.

To View the Program:
You may choose to view all activities of the program or just parts of it at any one time. All activities are arranged by date and time.

The views expressed here are those of the individual authors
and not necessarily those of the ASA or its board, officers, or staff.

Back to main JSM 2004 Program page
Activity Number: 89
Type: Contributed
Date/Time: Monday, August 9, 2004 : 8:30 AM to 10:20 AM
Sponsor: Section on Bayesian Statistical Science
Abstract - #301190
Title: Using Subpopulation Membership as a Bayesian Diagnostic Technique
Author(s): Guofen Yan*+ and J. Sedransk
Companies: Cleveland Clinic Foundation and Case Western Reserve University
Address: 9500 Euclid Ave., Wb4, Cleveland, OH, 44195,
Keywords: discrepancy ; model assessment ; posterior predictive p value ; test statistic
Abstract:

We investigate the ability of posterior predictive p values to detect unknown hierarchical structure. Since there is limited research in this area we study the simple, but important case where the data come from a two-stage hierarchical regression model while the fitted model does not include this feature. We consider a general class of discrepancy measures (i.e., minimum, maximum, 10th and 90th percentiles, mean, median and standard deviation), which are not motivated by knowledge of the hierarchical structure. We show that diagnostics based on some of the discrepancy measures listed above are not effective when applied to the entire dataset, but such diagnostics are useful when applied to important subpopulations.

  • The address information is for the authors that have a + after their name.
  • Authors who are presenting talks have a * after their name.

Back to the full JSM 2004 program

JSM 2004 For information, contact jsm@amstat.org or phone (888) 231-3473. If you have questions about the Continuing Education program, please contact the Education Department.
Revised March 2004