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Jan 14, 2019 at 3:23 comment added fuzzyTew this does show clearly that when subtracting two distributions with differing means, you can get the wrong sign in the result.
Jan 14, 2019 at 0:56 comment added fuzzyTew sum(rnorm(n, 10, 4)) - sum(rnorm(n, 9, 3)) this appears to be a distribution of the difference between the two sums each of n samples taken from the two distributions. did you perhaps mean the measured variances rather than the sums, to demonstrate the error in my approach? I'm not sure I see the relevance of the difference of sums of many samples.
Jan 13, 2019 at 23:56 history edited BruceET CC BY-SA 4.0
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Jan 13, 2019 at 23:50 history answered BruceET CC BY-SA 4.0