Methodology minute
Sample size and power

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A quick review of the basics of sample size and power is presented. Readers can participate in an online exercise that introduces them to a power calculator that can be used in their practice, and illustrates the concepts discussed in the article.

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Acknowledgment

The author thanks Dr Haomiao Jia of Columbia University School of Nursing for his careful review of this manuscript.

Reference (1)

  • Lenth RV. (2006-2009). Java applets for power and sample size [computer software]. Available from:...

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Conflicts of interest: None to report.

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Copyright © 2012 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Mosby, Inc. All rights reserved.