![]() ![]() ![]() How are t-tests used?įirst, you define the hypothesis you are going to test and specify an acceptable risk of drawing a faulty conclusion. A t-test may be used to evaluate whether a single group differs from a known value (a one-sample t-test), whether two groups differ from each other (an independent two-sample t-test), or whether there is a significant difference in paired measurements (a paired, or dependent samples t-test). A t-test (also known as Student's t-test) is a tool for evaluating the means of one or two populations using hypothesis testing.
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