![The noncentral t distribution in SAS](https://blogs.sas.com/content/iml/files/2022/09/NCT1-640x336.png)
The noncentral t distribution is a probability distribution that is used in power analysis and hypothesis testing. The distribution generalizes the Student t distribution by adding a noncentrality parameter, δ. When δ=0, the noncentral t distribution is the usual (central) t distribution, which is a symmetric distribution. When δ >