Noncentral T-distribution
In probability and statistics, the noncentral t-distribution (also known as the singly noncentral t-distribution) generalizes Student's t-distribution using a noncentrality parameter. Like the central t-distribution, the noncentral t-distribution is primarily used in statistical inference, although it may also be used in robust modeling for data. In particular, the noncentral t-distribution arises in power analysis.
Read more about Noncentral T-distribution: Characterization, Related Distributions