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Repeated Significance Tests on Accumulating Data

P. Armitage, C. K. McPherson and B. C. Rowe
Journal of the Royal Statistical Society. Series A (General)
Vol. 132, No. 2 (1969), pp. 235-244
Published by: Wiley for the Royal Statistical Society
DOI: 10.2307/2343787
Stable URL: http://www.jstor.org/stable/2343787
Page Count: 10
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Repeated Significance Tests on Accumulating Data
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Abstract

If significance tests at a fixed level are repeated at stages during the accumulation of data the probability of obtaining a significant result when the null hypothesis is true rises above the nominal significance level. Numerical results are presented for repeated tests on cumulative series of binomial, normal and exponential observations.

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