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t distribution

noun

Definition of t distribution

  1. :  a probability density function that is used especially in testing hypotheses concerning means of normal distributions whose standard deviations are unknown and that is the distribution of a random variable where u and v are themselves independent random variables and u has a normal distribution with mean 0 and a standard deviation of 1 and v2 has a chi-square distribution with n degrees of freedom —called also student's t distribution



Circa 1957

First Known Use of t distribution

circa 1957


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