# Independent Complex Samples t-Test - Comparing Two Means

Where and are the two means and and are their Standard Errors, the test statistic is:

,

where:

- ,
- the groups have sample sizes of and respectively (or effective sample sizes if a
*design effect*has been specified), - is 1 if
**Bessel's correction**is selected for**Means**in Statistical Assumptions and 0 otherwise.