# statsmodels.stats.proportion.samplesize_confint_proportion¶

statsmodels.stats.proportion.samplesize_confint_proportion(proportion, half_length, alpha=0.05, method='normal')[source]

find sample size to get desired confidence interval length

Parameters: proportion (float in (0, 1)) – proportion or quantile half_length (float in (0, 1)) – desired half length of the confidence interval alpha (float in (0, 1)) – significance level, default 0.05, coverage of the two-sided interval is (approximately) 1 - alpha method (string in ['normal']) – method to use for confidence interval, currently only normal approximation n – sample size to get the desired half length of the confidence interval float

Notes

this is mainly to store the formula. possible application: number of replications in bootstrap samples