Try rolling 2 six-sided dice. 7 is the number that appears the most so it’s at the middle of the curve, while 2 and 12 are at the ends of the distribution. Roll the dice multiple times to generate a distribution.
Now simulate rolling the dice with random numbers in LC the same way. Now conduct your own experiments, and graph your results. Have fun! Rick > On Jun 7, 2022, at 4:51 PM, David V Glasgow via use-livecode > <use-livecode@lists.runrev.com> wrote: > > > Quite a lot of stats and maths packages offer a feature whereby the N, the > Mean and the SD are variables specified by the user, and N random numbers are > then generated with the required mean and SD. I remember the venerable and > excellent Hypercard HyperStat > <https://link.springer.com/content/pdf/10.3758/BF03204668.pdf> (1993) by > David M Lane doing exactly that. > > In general terms, how do they do this? One option would be to ‘pair’ each > random number with its reciprocal around the mean, but that would generate > perfectly symmetrical distributions, not to mention is only half random. > > Alternatively you could ‘aim’ at the sum and do a little series of kludges at > the end of the RND generation. Ugly and cheaty, and neither addresses the SD > challenge > > Or is there an elegant formula? I have Googled about and can’t see one, but > maybe I don’t know the magic words. And if someone wanted to script this in > LC what would be the best approach? (just general guidance here, wouldn’t > want anyone to invest their valuable time in what is at present just vague > musings) > > Any hints from the stats gurus? > > Cheers > > David Glasgow > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
