Statistics`ConfidenceIntervals`
All functionality is available in the newly created Hypothesis Testing Package.
Load HypothesisTesting` to use the Hypothesis Testing Package functionality:
Version 5.2
![<< Statistics`ConfidenceIntervals`;
MeanCI[{1, 4, 2, 5, 10}]](Files/ConfidenceIntervals.en/legacy_1.gif)
The KnownVariance option replaces KnownStandardDeviation:
Version 5.2
![MeanCI[{1, 4, 2, 5, 10}, KnownStandardDeviation -> 2]](Files/ConfidenceIntervals.en/legacy_2.gif)