This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.
Abstract Details
Activity Number:
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387
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Type:
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Invited
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Date/Time:
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Tuesday, August 3, 2010 : 2:00 PM to 3:50 PM
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Sponsor:
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Memorial
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Abstract - #306063 |
Title:
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Collapsing Ordered Categories for Detecting the Emergence of Toxic Chemical by Using Dose-Response Curves
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Author(s):
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Takashi Yanagawa*+
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Companies:
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Kurume University
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Address:
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67 Asahi-Machi, Kurume-Shi, International, 830-0011, Japan
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Keywords:
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categorical data ;
dose-response ;
monitor the safety of water
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Abstract:
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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.
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The address information is for the authors that have a + after their name.
Authors who are presenting talks have a * after their name.
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