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

See Examples For:

Student's t

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

To look up a probability in the Student's t table we have to know the degrees of freedom in the problem.

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

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

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