t distribution

noun

: 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 {latex}t = \frac{u\sqrt{n}}{v}{/latex} 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

Examples of t distribution in a Sentence

Recent Examples on the Web Now known as t distributions, these plots resemble the normal distribution in that they’re bell-shaped, but the curves of the bell don’t drop off as sharply. Jack Murtagh, Scientific American, 25 May 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 't distribution.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

circa 1957, in the meaning defined above

Time Traveler
The first known use of t distribution was circa 1957

Dictionary Entries Near t distribution

Cite this Entry

“T distribution.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/t%20distribution. Accessed 22 Jul. 2024.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!