Abstract
A statistical test will not be able to detect a true difference if the sample size is too small compared with the magnitude of the difference. When designing experiments, the experimenter should try to ensure that a sufficient amount of data are collected to be reasonably sure that a difference of a specified size will be detected. R has methods for doing these calculations in the simple cases of comparing means using one- or two-sample t tests and comparing two proportions.
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Bibliography
Altman, D. G. (1991), Practical Statistics for Medical Research, Chapman & Hall, London.
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© 2008 Springer Science+Business Media, LLC
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Dalgaard, P. (2008). Power and the computation of sample size. In: Introductory Statistics with R. Statistics and Computing. Springer, New York, NY. https://doi.org/10.1007/978-0-387-79054-1_9
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DOI: https://doi.org/10.1007/978-0-387-79054-1_9
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Publisher Name: Springer, New York, NY
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