由买买提看人间百态

boards

本页内容为未名空间相应帖子的节选和存档,一周内的贴子最多显示50字,超过一周显示500字 访问原贴
Statistics版 - 如何确定data是normal distribution or Poisson
相关主题
test count data distribution in SAScompare the deviation of data points in two different group (转载)
请教个简单的统计问题(包子)请教一个基础统计问题
请教一个问题:y= min (x1, x2,..,xn) 的概率分布,where x1, ..., xn is Poisson distribution请教一个问题
大伙儿捧个人场吧ROC: multiple measurements for each subject?
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
相关话题的讨论汇总
话题: poisson话题: distribution话题: data话题: test话题: your
1 (共1页)
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
4
thanks 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.
1 (共1页)
相关主题
[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
关于 t 和 Fbayesian 一道作业题:
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)
请教个简单的统计问题(包子)请教一个基础统计问题
请教一个问题:y= min (x1, x2,..,xn) 的概率分布,where x1, ..., xn is Poisson distribution请教一个问题
大伙儿捧个人场吧ROC: multiple measurements for each subject?
相关话题的讨论汇总
话题: poisson话题: distribution话题: data话题: test话题: your