t distribution

a theoretical probability distribution that plays a central role in testing hypotheses about population means, among other parameters. It is the sampling distribution of the statistic (M – μ₀)/s, where μ₀ is the mean of the population from which the sample is drawn, M is the estimate of the mean of the population as obtained from sample data, and s is the standard deviation of the data set. Also called Student’s t distribution.

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Psychology term of the day

October 10th 2024

anal eroticism

in psychoanalytic theory, pleasurable sensations associated with expulsion, retention, or observation of the feces or through stimulation of the anus. These sensations first arise in the anal stage of psychosexual development, between the ages of 1 and 3. Also called anal erotism. See also anal personality; coprophilia.