Student's t Distribution

These functions give you access to the Student's t distribution. For more information about Fathom's distribution functions, click here.

 

tDensity(x, df, center, scale)

tCumulative(x, df, center, scale)

tQuantile(x, df, center, scale)

 df = degrees of freedom
center =
translation amount
scale =
dilation factor

The density, cumulative, and quantile functions for Student's t distribution.

The df (degrees of freedom) parameter is required. It determines the shape of the distribution; generally, it's one less than the sample size.

defaults: center = 0, scale = 1

You may also draw random values from this distribution:

randomT(df, center, scale)

a random value drawn from that distribution.

 

Example: Here we see the t (1 degree of freedom) and normal distributions plotted together.

 

See also statistical functions (for mean( ) and its cousins).