Student's t

British  

noun

1. 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

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Etymology

Origin of Student's t

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

Example Sentences

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

From Textbooks • Nov. 29, 2017

The Student's t distribution thus is tied to the normal distribution, but has degrees of freedom that come from those of the Chi squared distribution.

From Textbooks • Nov. 29, 2017

From the Student’s t table, at the row marked 9 and column marked .005, is the number of standard deviations to capture 99% of the probability, 3.2498.

From Textbooks • Nov. 29, 2017

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

In reality there are an infinite number of Student's t distributions, one for each adjustment to the sample size.

From Textbooks • Nov. 29, 2017