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 : str in ['normal']¶

method to use for confidence interval, currently only normal approximation

Returns:¶

n – sample size to get the desired half length of the confidence interval

Return type:¶

float

Notes

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