t distribution

American  

[tee dis-truh-byoo-shuhn] / ˈti dɪs trəˌbju ʃən /

Or t-distribution

noun

Statistics.

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

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t distribution British  

noun

1. See Student's t

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Etymology

Origin of t distribution

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

Example Sentences

See Examples For:

t distribution

You use the t distribution because you do not know the population standard deviation, and the degrees of freedom are 24 because df = n – 1.

From Textbooks ● Mar. 27, 2020

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

From Textbooks ● Nov. 29, 2017

If the sample size were larger than 30, we could simply substitute the point estimate for σ, the sample standard deviation, s, and use the student's t distribution to correct for this lack of information.

From Textbooks ● Nov. 29, 2017

The difference is that the students t distribution is symmetrical and the Chi squared distribution is not.

From Textbooks ● Nov. 29, 2017

Remember that the student's t distribution can only be computed knowing the proper degrees of freedom for the problem.

From Textbooks ● Nov. 29, 2017