Probability Calculator for theFDistribution / Conceptual Overview: Explore how to obtain exact values for the upper tail probabilities ofF-statistic using specific inputs fordf,F-ratio, andp.

The figure below shows the graph of anFdistribution. Change the numbers in any box and the graph will update automatically.

• Change numerator and denominatordfto match the value for yourF-statistic. Note thatdfmay have fractional values.
• ChangeF-Ratioand the probability of obtaining a value ofFthat large or larger will be displayed.
• Changepand the graph will display the critical value forFdefining the upper tail with probabilityp.

Limits:

• 1 df1 100
• 2df2 1000
• 0.005 p 0.995

Numerator df:2Denominator df:20F-ratio:3.493p:0.05

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