# francogrex

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bio website location age member for 2 years, 7 months seen Oct 23 '11 at 14:14 profile views 11

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 Dec5 awarded Nice Question Oct13 awarded Notable Question Nov14 awarded Popular Question Oct4 accepted How to compute the confidence interval of the ratio of two normal means Oct2 comment How to compute the confidence interval of the ratio of two normal means It's very good references, I also like that you actually made a calculator for it (+1). As expected though, in your calculator you clearly state that when the confidence interval of the denominator includes zero, it is not possible to compute the CI of the quotient. I think it's the same that happens when I try solving the quadratic equation. suppose variance is 1, mu1 = 0 and mu2=1, N=10000. It's unsolvable. Oct2 comment How to sample from a normal distribution with known mean and variance using a conventional programming language? @Arun it is the easiest way. You can also generate from the pdf directly using for example the "acceptance rejection" method. I posted for you a simple example on my site (because not enough space in the comment box here). Oct2 awarded Supporter Oct2 awarded Teacher Oct2 comment How to sample from a normal distribution with known mean and variance using a conventional programming language? When I posted my answer above I didn't notice that @vitalStatistix gave you the Box-Muller Transform algorithm. The one I give above is also as good I suppose. Oct2 answered How to sample from a normal distribution with known mean and variance using a conventional programming language? Oct2 asked How to compute the confidence interval of the ratio of two normal means Jun4 comment Distribution of a ratio of two proportions It may help you to think of it as a random vector R = (r1, r2) with mean mu = (p1, p2). But I'll doubt anyone could come up with a better answer than Greg Snow gave below. Jun3 comment Distribution of a ratio of two proportions OK, the closest statistic I could find is called the Location Quotient. However they don't describe a pdf. Jun3 accepted Distribution of a ratio of two proportions Jun3 revised Distribution of a ratio of two proportions deleted 1 characters in body Jun3 comment Distribution of a ratio of two proportions Ok thanks but I really would like to know the distribution p1/p2; it would be in similar spirit to what they use as a distribution for the odds ratio or the risk ratio or the (log odds) to be able to estimate statistics of interest like its mean and variance, confidence intervals etc... Jun3 asked Distribution of a ratio of two proportions May12 awarded Scholar May12 accepted Odds ratios multiple comparisons May11 awarded Student