This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.

Abstract Details

Activity Number: 387
Type: Invited
Date/Time: Tuesday, August 3, 2010 : 2:00 PM to 3:50 PM
Sponsor: Memorial
Abstract - #306063
Title: Collapsing Ordered Categories for Detecting the Emergence of Toxic Chemical by Using Dose-Response Curves
Author(s): Takashi Yanagawa*+
Companies: Kurume University
Address: 67 Asahi-Machi, Kurume-Shi, International, 830-0011, Japan
Keywords: categorical data ; dose-response ; monitor the safety of water

This paper is concerned with constructing monitoring system based on the following experiment for detecting the emergence of toxic chemical in a fresh water system by using the behavior of snails. First, the behavior of snails when exposed to toxic chemical is classified into K ordered categories, reflecting severity of exposure. Next, snails are classified randomly into R dose groups, and snails in each group are exposed to pre-assigned dose of chemical for fixed hours in a day, and it is repeated for D days. The data may be summarized in a D x R x K table. For constructing simple and quick monitoring system it is desired to collapse K categories into two. Using dose-response curves we develop statistical method to achieve this goal so that these two categories may give the most sensitive detection for the emergence of the chemical.

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 2010 program

2010 JSM Online Program Home

For information, contact or phone (888) 231-3473.

If you have questions about the Continuing Education program, please contact the Education Department.