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any in a class of statistical tests used to find the difference between the means of either a sample and a population, two different sample groups, two matched samples, or the same sample at two different points in time.
t testA statistical test used to compare the means of two groups of test data.
t-testStudent's t-test, see there.
t-test(statistics) a test of SIGNIFICANCE that enables the means of two small samples (less than 30) to be compared, in order to assess if they came from the same population or from populations with different means.
a test of statistical significance which uses a formula from which a t value is derived. The value is then compared with a set of t-distribution tables to see whether the null hypothesis should be rejected or not.