t Distribution

Transform > Probability Distributions > t

 

Calculates the probability densities, cumulative probabilities, and inverse cumulative probabilities for a t distribution.

The t distribution is symmetric about zero but has tails that are more spread out than those of the normal distribution. With increasing degrees of freedom, the t distribution looks more like the normal distribution.

 

 

Dialog box items

Source Column:
Enter the column you want to evaluate.

Target Column:
Enter a storage column for the generated values. Leave blank to have VisualStat automatically name the target column.

Statistics:
Choose from the following options:

oProbability density: Choose to calculate the probability densities.

oCumulative probability: Choose to compute the cumulative probabilities.

oInverse cumulative probability: Choose to compute the inverse of the cumulative probabilities.

Distribution: Select the distribution for the variable.

Deg Freedom: Enter the number of degrees of freedom you want to define the t distribution.

 

 

Example

Example of using the probability density function (pdf)

 

 

 

See Also:


Probability Distributions

Web Resource: NIST e-Handbook of Statistical Methods, 2006 | Weisstein, Eric W., Wolfram MathWorld. | Probability and statistics EBook | Wikipedia