Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

t distribution


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

Seen and Heard

What made you want to look up t distribution? Please tell us where you read or heard it (including the quote, if possible).


a secret group of plotters

Get Word of the Day daily email!