Nothing
The tatest is a modified twosample or twogroup ttest of Gosset (1908). In small samples with less than 15 replicates,the tatest significantly reduces type I error rate but has almost the same power with the ttest and hence can greatly enhance reliability or reproducibility of discoveries in biology and medicine. The tatest can test single null hypothesis or multiple null hypotheses without needing to correct pvalues.
Package details 


Author  YuanDe Tan 
Maintainer  YuanDe Tan <tanyuande@gmail.com> 
License  GPL3 
Version  1.0 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.