Probability Calculator

Total Access Statistics includes a powerful utility to evaluate the probability of test values. To access the probability calculator, press the [Probability Calculator] button from the main menu:

The option buttons on the left side allow you to choose the type of probability to evaluate: Z-Value, t-Value (student's t test), Chi-Square, and F-Value. Depending on the option selected, you may need to enter zero, one, or two degrees of freedom in addition to the test value to evaluate. Enter the values requested and the probability value appears.

Inverse Probability Calculation

Given a probability and degrees of freedom, the probability calculator can determine the test value. Select the Inverse option to do this.