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t distribution

American  
[tee dis-truh-byoo-shuhn] / ˈti dɪs trəˌbyu ʃən /
Or t-distribution

noun

Statistics.
  1. a bell-shaped probability distribution that is flatter or more stretched out than the normal distribution.


t distribution British  

noun

  1. See Student's t

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of t distribution

First recorded in 1955–60; see origin at Student's t distribution

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Distribution: Student’s t distribution with n – 1 degrees of freedom.

From Textbooks • Mar. 27, 2020

As the number surveyed increases, the area to the left of –1 for the Student’s t distribution approaches the area for the standard normal distribution.

From Textbooks • Mar. 27, 2020

The test statistic is written as a student's t distribution, but if the sample size is larger enough so that the degrees of freedom are greater than 30 we may again use the normal distribution.

From Textbooks • Nov. 29, 2017

Mathematically, as the degrees of freedom increase, the t distribution approaches the standard normal distribution.

From Textbooks • Nov. 29, 2017

He therefore created the Student's t distribution as a ratio of the normal distribution and Chi squared distribution.

From Textbooks • Nov. 29, 2017

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