6.8.5.2.26. statsmodels.sandbox.stats.multicomp.simultaneous_ci¶
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statsmodels.sandbox.stats.multicomp.
simultaneous_ci
(q_crit, var, groupnobs, pairindices=None)[source]¶ Compute simultaneous confidence intervals for comparison of means.
q_crit value is generated from tukey hsd test. Variance is considered across all groups. Returned halfwidths can be thought of as uncertainty intervals around each group mean. They allow for simultaneous comparison of pairwise significance among any pairs (by checking for overlap)
Parameters: q_crit : float
The Q critical value studentized range statistic from Tukey’s HSD
var : float
The group variance
groupnobs : array-like object
Number of observations contained in each group.
pairindices : tuple of lists, optional
Indices corresponding to the upper triangle of matrix. Computed here if not supplied
Returns: halfwidths : ndarray
Half the width of each confidence interval for each group given in groupnobs
See also
MultiComparison
- statistics class providing significance tests
tukeyhsd
- among other things, computes q_crit value
References
[R79] Hochberg, Y., and A. C. Tamhane. Multiple Comparison Procedures. Hoboken, NJ: John Wiley & Sons, 1987.)