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

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

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

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

From Textbooks • Nov. 29, 2017

As the sample size increases, the Student's t distribution become more and more like the normal distribution.

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