STUDENTS t-TEST
Student's t -test 35 languages Article Talk Read Edit View history From Wikipedia, the free encyclopedia A t -test is any statistical hypothesis test in which the test statistic follows a Student's t -distribution under the null hypothesis . It is most commonly applied when the test statistic would follow a normal distribution if the value of a scaling term in the test statistic were known (typically, the scaling term is unknown and therefore a nuisance parameter ). When the scaling term is estimated based on the data , the test statistic—under certain conditions—follows a Student's t distribution. The t -test's most common application is to test whether the means of two populations are different. History [ edit ] William Sealy Gosset , who developed the " t -statistic" and published it under the pseudonym of "Student" The term " t -statistic" is abb...