The t-test (t-test) is one of the techniques that researchers used the test by this method in the case of a small amount of data (n < 30) who discovered the distribution of t is called W.S.Gosset wrote the works published by using the pen name "student", new knowledge that if there are a number of less information. The distribution will not be the usual theoretical curvy. Later, this new distribution called t-distribution and referred to Student testing time by this distribution properties t-test (string line ranks and enlisted ranks, angkhana 2540 (1997), 240 pages), the test statistic t testing, the difference of the average applicable to cases where there is a population group, and two groups.
การแปล กรุณารอสักครู่..
