# Student's t-Distribution and Its Normal Approximation

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This Demonstration replaces the need for Student -distribution tables in elementary statistics courses. Critical values for confidence intervals and -value computations may be obtained using the first display, "t pdf". The checkbox, "complement" toggles between the tail-area and central-area displays.

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Contributed by: Ian McLeod (March 2011)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

The Q-Q plot for comparing theoretical and empirical distributions is discussed with examples in [1].

[1] W. S. Cleveland, *Visualizing Data*, Summit, NJ: Hobart Press, 1993.

## Permanent Citation