Improved Graphs for Calculating Sample Sizes when Comparing. Two Independent Binomial Distributions

Author(s): Bartlett, D.

Journal/Book: Biometrics. 1979; 35: 875-881.

Abstract: Feigl (1978) gave a graphical aid for determining sample size when comparing two independent binomial proportions. The calculations of n were based an the arcsine formula. We present in this paper recomputed graphs based an the improved approximate formula of Casagrande, Pike and Smith (1978).

Keyword(s): Sample size

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