Natural Resource BiometricsTesting differences between two samples with different varianceIf the two variance are significantly different, we test them with this procedure. Testing the difference between two meansThe means of two samples can be tested for difference by: You will need to calculate the degrees of freedom for the critical value with the following formula: If this formula produces a decimal value truncate the value to an integer.
Also See: Chapter 9  Significance of a Difference between Two Means pages 108124 in:
Chapter 9  TwoSample Hypotheses pages 126130 in:

Natural Resources Biometrics by David R. Larsen is licensed under a Creative Commons AttributionShareAlike 4.0 International License . Author: Dr. David R. Larsen Created: July 19, 2000 Last Updated: July 29, 2014 