pivotal variable

a quantity that is a function of a statistic (e.g., sample mean, sample size) and a parameter (e.g., population mean, variance) and that is used in inferential tests based on a normal distribution. The z score, t score, and F ratio are all examples of pivotal variables.

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Psychology term of the day

November 25th 2024

confusion effect

an antipredator behavior in which each of several animals moves or vocalizes in a highly random way, making it difficult for predators to locate and attack any one individual. See also dilution effect.