SAMPLE SIZE DETERMINATION BASED ON MID-P VALUE FOR USE WITH THE TESTING IN 2×2 COMPARATIVE TRIALS : To the memory of the late Professor Kazumasa Wakimoto
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- Iwasaki Manabu
- Department of Industrial Engineering, Seikei University
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- Tanida Takuo
- Department of Industrial Engineering, Seikei University
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Abstract
In testing two binomial probabilities Fisher's exact test is known to be too conservative. As a consequence, it requires a large sample size than expected to detect statistical significance. The use of mid-P value instead of the ordinary P-value in the testing would be one possibility to resolve such conservatism. This article investigates how much sample size can be reduced by adopting the mid-P value. It is shown that the sample sizes are almost comparable to those of unconditional tests. A table of sample sizes is given for the reasonable range of parameters to achieve the power of 0.8 or more when the significance level is 0.05.
Journal
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- Journal of the Japanese Society of Computational Statistics
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Journal of the Japanese Society of Computational Statistics 7 (1), 57-64, 1994-12
Japanese Society of Computational Statistics
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Details
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- CRID
- 1570291226977200512
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- NII Article ID
- 110001235611
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- NII Book ID
- AA10823693
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- ISSN
- 09152350
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- Text Lang
- en
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- Data Source
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- CiNii Articles