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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

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

In this case this is the Student’s t because we do not know the population standard deviation and the sample is small, less than 30.

From Textbooks • Nov. 29, 2017

This conclusion comes directly from the derivation of the Student's t distribution by Mr. Gosset.

From Textbooks • Nov. 29, 2017

This relationship between the Student's t distribution and the normal distribution is shown in Figure 8.8.

From Textbooks • Nov. 29, 2017

The Student's t distribution has one of the most desirable properties of the normal: it is symmetrical.

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

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