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2008 Oct 22
2
Calculating confidence limits for the difference between means
Colleagues, I am working on a problem at the edge of my knowledge of statistics. Basically, I have values for two groups - I am trying to calculate the 90% confidence limits for the difference between means. I can implement this without difficulty based on standard equations that are available in stat textbooks: (difference between means) / (pooled standard error) My problem arises