http://stats.stackexchange.com/questions/37993/is-there-a-minimum-sample-size-required-for-the-t-test-to-be-valid http://stats.stackexchange.com/questions/37993

http://stats.stackexchange.com/questions/37993/is-there-a-minimum-sample-size-required-for-the-t-test-to-be-valid http://stats.stackexchange.com/questions/37993/is-there-a-mi... "Historically, the very first demonstration of the t-test (in "Student"'s 1908 paper) was in an application to sample sizes of size four. Indeed, obtaining improved results for small samples is the test's claim to fame"