W3cubDocs

/Statsmodels

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
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

© 2009–2012 Statsmodels Developers
© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.stats.proportion.samplesize_confint_proportion.html