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

For example, the probability is .10 that a Student’s t random variable with 10 degrees of freedom exceeds 1.372.

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

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

From Textbooks • Nov. 29, 2017

And as we did before, we used a Student's t to compensate for this lack of information on the population variance.

From Textbooks • Nov. 29, 2017

These are then placed on the graph remembering that the Student’s t is symmetrical and so the t-value is both plus or minus on each side of the mean.

From Textbooks • Nov. 29, 2017