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Non-central t distribution and the power of the t test: A rejoinder
       
Denis Cousineau , Louis Laurencelle
1-4
Keywords: Statistical power , t test , Noncentral t distribution . Tools: None.
(no sample data) (no appendix)

Non-central t distribution needed for assessing the power of the t test is described. Three approximations are compared and their merits discussed in regard to simplicity and accuracy.

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