Natural Resource BiometricsConfidence Limits for Population MeansFormated version of this page for printingTo calculate confidence limits for population meansYou can calculate a pooled variance as: Confidence limits for population means You can calculate this with: where Xi is the mean of each population, ta(2),v is the t value for the confidence range, with a(2) significance and v degrees of freedom. The variance is the pooled variance from above and n is the number of samples taken.
Also See: Chapter 9  TwoSample Hypotheses pages 130132 in:

This work is licensed under a Creative Commons AttributionNoncommercial 3.0 United States License. Author: Dr. David R. Larsen Created: August 17, 1998 Last Updated: August 11, 2010 