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Statistics版 - 如何确定data是normal distribution or Poisson

test count data distribution in SAScompare the deviation of data points in two different group (转载)

Gamma distribution for power analysis,请大拿指点gamma distribution + mgf
poisson transformationhow to determine data fit some distribution? thanks
bayesian 一道作业题:问个简单的p-value问题
ANOVA model 中 CELL count 过小到底对model有什么影响[合集] how to calculate chisq value in R

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 i*****r发帖数: 24 1看到个问题，已知degree of freedom N-1, 和 （kai) x^2,查表得，x^2 falls between 0.9 and 0.5, conclusion data set is Poisson distribution. 不是统计专业的，不懂为什么，请给点建议。谢谢。 m****r发帖数: 237 2这个问题不是很明确。。不过看你的意思应该是在test if the data follows a poiss on distribution or not. Chisq-test can be used to test whether a random variable is from some specif ied distribution, for instance, poisson in your case. Your p-value here is between 0.5 and 0.9, you can't reject your null hypothe sis, which is the data follows poisson distribution. That's how you get your result. There is a theorem behind this. You can google for chi-square test for it. O ne of the application of Chi-square test 【在 i*****r 的大作中提到】 : 看到个问题，已知degree of freedom N-1,: 和 （kai) x^2,查表得，x^2 falls between 0.9 and 0.5,: conclusion data set is Poisson distribution.: 不是统计专业的，不懂为什么，请给点建议。谢谢。 P****D发帖数: 11146 3请楼主给出上下文。 i*****r发帖数: 24 4thanks for replying. the question is this, i explained it wrongly, yesterda y. " A series of 25 measurements on a radioactive sample provides a mean of 950 and value of 17,526 for sum(xi-r)^2(for i=1 to N), Do the data follow norma l distribution?" Ans: use formula, chi^2=18.5. look at table p between 0.9 to 0.5. so is Poisson Distribution.
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[合集] how to calculate chisq value in RGamma distribution for power analysis,请大拿指点
A question about mean, variance, and distribution function.poisson transformation

tweedie distributionANOVA model 中 CELL count 过小到底对model有什么影响
test count data distribution in SAScompare the deviation of data points in two different group (转载)