Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons

Open Access. Powered by Scholars. Published by Universities.®

Statistics and Probability

PDF

Selected Works

Chris J. Lloyd

2013

Articles 1 - 3 of 3

Full-Text Articles in Physical Sciences and Mathematics

On The Exact Size Of Multiple Comparison Tests, Chris Lloyd Dec 2012

On The Exact Size Of Multiple Comparison Tests, Chris Lloyd

Chris J. Lloyd

No abstract provided.


On The Size Accuracy Of Combination Tests, Chris Lloyd Dec 2012

On The Size Accuracy Of Combination Tests, Chris Lloyd

Chris J. Lloyd

One element of the analysis of adaptive clinical trials is combining the evidence from several (often two) stages. When the endpoint is binary, standard single stage tests statistics do not control size well. Yet the combined test might not be valid if the single stage tests are not. The purpose of this paper is to numerically and theoretically examine the extent to which combining basic tests statistics mitigates or magnifies the size violation of the final test.


Aging Population Scenarios: An Australian Experience, Chris Lloyd Dec 2012

Aging Population Scenarios: An Australian Experience, Chris Lloyd

Chris J. Lloyd

One element of the analysis of adaptive clinical trials is combining the evidence from several (often two) stages. When the endpoint is binary, standard single stage tests statistics do not control size well. Yet the combined test might not be valid if the single stage tests are not. The purpose of this paper is to numerically and theoretically examine the extent to which combining basic tests statistics mitigates or magnifies the size violation of the final test.