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Abstract Details
Activity Number:
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569
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Type:
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Contributed
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Date/Time:
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Wednesday, August 3, 2011 : 2:00 PM to 3:50 PM
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Sponsor:
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Biometrics Section
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Abstract - #300630 |
Title:
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Group Sequential Methods Based on Ranked Set Samples
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Author(s):
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Esam Abdul-Qatar Al-Sawi*+ and Abdul K. Hussein and H. A. Muttlak
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Companies:
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King Fahd University and University of Windsor and King Fahd University
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Address:
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Petroleum and Minerals Department, Dhahran, International, +966, KSA
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Keywords:
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Auxiliary information ;
Group sequential methods ;
Ranked set sampling ;
Two-sample hypotheses
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Abstract:
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Ranked set sampling schemes were originally proposed to increase efficiency in estimation. On the other hand, group sequential methods provide substantial savings in sample and enable us to make decisions as early as possible. In this manuscript, we intend to combine the benefits of the two methodologies. We propose group sequential tests for one and two population means under ranked set sampling. We compare the power, average sample sizes and type I errors of the proposed tests to those of group sequential tests based on simple random sampling schemes. We illustrate the utility of the method by using data from a leukemia clinical trial.
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