The program t_Test evaluates the difference in means between two
independent samples, its (two-tailed) significance, and the 95%-
confidence interval of the difference in means. The equality of
variances assumption will be tested via the F-ratio and results
are presented for the assumptions of homogeneous (non significant
F-test) and heterogenous (significant F-test) variances.

t-Test interactively asks for the means, standard deviations and
sample sizes of both groups and shows the results on the screen
(for printing the results you may press PRINT on the keyboard and
copy the screenshot into a document of a text processor).