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2017-05-20 09:48:15 +0100 | asked a question | Solving returns x
There are other questions that appear to have the same problem, but honestly I don't understand the answers, and this is a much simpler equation. Why doesn't Sage solve it? I can do it in Maple and by hand in vanilla Python with the math module. |
2017-05-19 15:38:34 +0100 | commented answer | Problems with sage solve. I don't understand the answer. Could you be more explicit, please? I'm having a similar problem: sage: f=4.94 * 1.062^x sage: solve(f(x) == 15, x) [531^x == 750/247*500^x] |
2017-05-19 15:37:59 +0100 | answered a question | Problems with sage solve. I don't understand the answer. Could you be more explicit, please? I'm having a similar problem: sage: f=4.94 * 1.062^x sage: solve(f(x) == 15, x) [531^x == 750/247*500^x] |
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2017-05-01 17:59:12 +0100 | asked a question | Finding a p-value in goodness of fit test I'm trying to find the p-value in a goodness of fit test comparing a set of observed values to a set of expected values. In Maple I can do it with ChiSquareGoodnessOfFitTest(Ob, Ex, level = 0.5, summarize = true), but I can't figure out its equivalence in Sage. There's a function sage.stats.r.ttest(x, y), but when I run it on my sets, it says the p-value is 1 (it's supposed to be 0.00001778, as in Maple). The sets for reference are expected=[47.04, 25.48, 31.36, 39.2, 25.48, 27.44], observed=[42, 35, 9, 41, 41, 28]. |
2017-04-28 13:58:17 +0100 | commented answer | Problem recreating example of normal distribution from TI-Nspire I'll have to read up on that. Thank you for the reference. |
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2017-04-27 20:16:36 +0100 | asked a question | Problem recreating example of normal distribution from TI-Nspire I have to recreate this formula for calculating normal distribution in Sage: http ://ntaj.dreamhosters.com/ti.jpg The picture is from TI-Nspire CAS. What I'm doing is: sage: f=1/(0.1sqrt(2pi)) * e^((-1/2)*((x-4)/0.1))^2 sage: float(integral(f, 3.9, 4.1)) 0.8696735925295498 I can't get the expected result 0.682689 that Nspire gives. Can anyone see why? |