DescrStatsW.zconfint_mean(alpha=0.05, alternative='twosided')
[source]
twosided confidence interval for weighted mean of data
Confidence interval is based on normal distribution. If the data is 2d, then these are separate confidence intervals for each column.
Parameters: 


Returns: 
lower, upper – lower and upper bound of confidence interval 
Return type: 
floats or ndarrays 
In a previous version, statsmodels 0.4, alpha was the confidence level, e.g. 0.95
© 2009–2012 Statsmodels Developers
© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.stats.weightstats.DescrStatsW.zconfint_mean.html