Student's t

British

noun

a statistic often used to test the hypothesis that a random sample of normally distributed observations has a given mean, μ; given by t = ( ̄x– μ) √n/s where ̄x is the mean of the sample, s is its standard deviation, and n is the size of the sample

"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 Student's t

after Student, the pen name of W. S. Gosset (1876–1937), English statistician and research scientist

Example Sentences

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Student's t

To determine the critical value of the Student's t we need the degrees of freedom.

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

The critical value is a Student's t with degrees of freedom equal to the number of pairs, not observations, minus 1.

From Textbooks ● Nov. 29, 2017

What the Student's t distribution does is spread out the horizontal axis so it takes a larger number of standard deviations to capture the same amount of probability.

From Textbooks ● Nov. 29, 2017

When the sample size reaches 30 the normal distribution is usually substituted for the Student's t because they are so much alike.

From Textbooks ● Nov. 29, 2017

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023