Author(s): Chang MN, Shuster JJ, Kepner JL
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Abstract Two-step tests based on historical control data are proposed for detecting different means when experimental and control populations are normally distributed with possibly different known variances. The results readily extend to the case where the control and experimental data are dichotomous. Provisions for early acceptance and early rejection are included.
This article was published in Control Clin Trials
and referenced in Journal of Biometrics & Biostatistics