t test

any of a class of statistical tests based on the fact that the test statistic follows the t distribution when the null hypothesis is true. Most t tests deal with hypotheses about the mean of a population or about differences between means of different populations, where those populations show normal distributions and the variances are unknown and need to be estimated. The test can be used with independent groups (e.g., test scores of those who were given training vs. a control group without training) or dependent groups (e.g., test scores before vs. after training). Also called Student’s t test.

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Psychology term of the day

November 21st 2024

brooding compulsion

an irresistible drive to mentally review trivial details or ponder abstract concepts as a means of reducing distress or preventing some dreaded event or situation.