F distributions

[Image]
Figure 1. Example of an F distribution illustrating the critical value for an a = 0.05, v1 = 10, v2 = 10.

For table of F critical values at the a = 0.05 level.

In Excel® to look up a table number use:

=F.INV.RT(probability, degrees of freedom 1, degrees of freedom 2)

Example:
=F.INV.RT( 0.05, 29, 29 )
Which will produce:
1.860811


Also See:

Chapter 9 - Significance of a Difference between Two Means pages 108-124 in:

Phillips, J. L. 2000. How to think about statistics. W. H. Freeman and Co. New York. 202 pp. ISBN 0-7167-3654-3

Chapter 9 - Two-Sample Hypotheses pages 126-130 in:

Zar, J. H. 2007. Biostatistical Analysis. Prentice-Hall, Inc. Englewood Cliffs, New Jersey. 718 pp.


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Natural Resources Biometrics by David R. Larsen is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

Author: Dr. David R. Larsen
Created: July 19, 2000
Last Updated: September 24, 2014