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HYPOTHESIS TESTING PACKAGE SYMBOL
MeanDifferenceCI
gives a confidence interval for the difference between the population means estimated from 
and 
.
Details
- To use
, you first need to load the Hypothesis Testing Package using Needs["HypothesisTesting`"]. 
gives a confidence interval 
centered at Mean[list1]-Mean[list2]. 
is based on a normal distribution if the population variances are assumed known.- If the variances for the two populations are assumed equal and unknown, the interval is based on Student's
distribution with Length[list1]+Length[list2]-2 degrees of freedom. - If the population variances are not assumed known and not assumed equal, Welch's approximation for the degrees of freedom is used.
- The following options can be given:
-
ConfidenceLevel 0.95 probability associated with a confidence interval EqualVariances False whether the unknown population variances are assumed equal KnownVariance None list of variances of each population
