(35S) Statistical Distributions Functions
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11-20-2015, 11:06 PM
(This post was last modified: 11-21-2015 01:49 PM by Dieter.)
Post: #73
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RE: HP 35s Statistical Distributions Functions
(11-20-2015 05:45 PM)PedroLeiva Wrote: I loaded your labels for cumulative Binomial and Poisson function, they work perfectly well. I have reworked this a bit so that now the same values as with the other distributions are returned. This includes the upper CDF (which in these cases is not just 1 minus the lower CDF) as well as the PDF (or PMF - probability mass function -, to be more precise). Code: P001 LBL P // Poisson CDF These versions return: in Z: the Poisson resp. Binomial PDF, i.e. P(X=x) in Y: the Poisson resp. Binomial upper CDF, i.e. P(X≥x) in X: the Poisson resp. Binomial lower CDF, i.e. P(X≤x) This matches the returned values for the Chi² and F distribution. Like in these cases, the upper CDF and the PDF are returned in registers C and D as well. Looks like the user instructions need an update. ;-) At the moment I don't think I'll add the Poisson and Binomial quantile functions – that's a rather complex story. Edit: it looks like the Poisson quantile is not that complicated. At least an experimental version seems to run without major problems. ;-) Dieter |
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