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Current sample size conventions: Flaws, harms, and alternatives

Peter Bacchetti

Author Affiliations

Department of Epidemiology and Biostatistics, Box 0560, University of California, San Francisco, CA 94143, USA

BMC Medicine 2010, 8:17  doi:10.1186/1741-7015-8-17

Published: 22 March 2010

Additional files

Additional file 1:

Comments on two possible objections. Discusses two possible objections to the case made in this paper.

Format: PDF Size: 19KB Download file

This file can be viewed with: Adobe Acrobat Reader

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Additional file 2:

Cost-based sample size. This is an interactive Microsoft Excel spreadsheet that facilitates determination of sample sizes nmin and nroot using the simple cost-based methods noted in the Alternatives section.

Format: XLS Size: 55KB Download file

This file can be viewed with: Microsoft Excel Viewer

Open Data