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Statistics版 - 问个简单的p-value问题
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新手问一个很基础的SAS code问题请问统计上看两组数字是不是一一对应相等的问题(aggrement/concordence analysis?)
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non inferiority test for the difference of two proportions in "proc freq" ?如何做sampling
相关话题的讨论汇总
话题: p2话题: p1话题: test话题: n1话题: use
进入Statistics版参与讨论
1 (共1页)
a****t
发帖数: 152
1
现在有两组数据,假设male (n=100)得病率16%, female (n=160)得病率22%
要问这两组的得病率是不是sig. different怎么做?
用z value算,还是t test? or chi-square?
s*r
发帖数: 2757
2
chi2

【在 a****t 的大作中提到】
: 现在有两组数据,假设male (n=100)得病率16%, female (n=160)得病率22%
: 要问这两组的得病率是不是sig. different怎么做?
: 用z value算,还是t test? or chi-square?

S******y
发帖数: 1123
3
Can we use two-sample t-test?
assuming equal or unequal variance
p********6
发帖数: 1339
4
I don't think you can use t-test. However, you can use proportion test.
f**g
发帖数: 18
5
用EXCEL怎么做proportion test?

【在 p********6 的大作中提到】
: I don't think you can use t-test. However, you can use proportion test.
S******y
发帖数: 1123
6
There is a formula for that.
You can calculate yourself.
Google it to find more...
a****t
发帖数: 152
7
你说的是pooled estimate of population propotion? 然后算z-->p
有看过一个paper用2 sample t-test来算,有点想不通

【在 S******y 的大作中提到】
: There is a formula for that.
: You can calculate yourself.
: Google it to find more...

S******y
发帖数: 1123
8
DIFFERENCE IN TWO PROPORTIONS, LARGE SAMPLES
95% confidence interval for the difference in proportions, for large n1 and
n2, and independent samples -
(P1 - P2) +_ 1.96 * sqrt ( P1*(1-P1)/N1 +P2*(1-P2)/N1 )
Read more in "Introductory Statistics for Business and Economics" by
Wonnacott and Wonnacott
S******y
发帖数: 1123
9
typo..
should be ...
(P1 - P2) +_ 1.96 * sqrt ( P1*(1-P1)/N1 +P2*(1-P2)/N2 )
b***t
发帖数: 348
10
Anybody can tell me how can we perform two sample proportion tests in SAS?
Thanks.
g******n
发帖数: 339
11
In clinical trials, people also use Fisher's exact test to compare two
proportions when the sample sizes are not large(<1000). The results may not
differ much from the chisq test though.
Use SAS PROC FREQ for fisher and chisq.

【在 a****t 的大作中提到】
: 现在有两组数据,假设male (n=100)得病率16%, female (n=160)得病率22%
: 要问这两组的得病率是不是sig. different怎么做?
: 用z value算,还是t test? or chi-square?

1 (共1页)
进入Statistics版参与讨论
相关主题
如何做samplingwhich statistics?
请教一个关于confidence level 和 p-value 概念的问题[求教]文献里的一句话,关于MCMC的
问一道关于categorical里proportion的问题Question on PROC FREQ
sample size calculationnon inferiority test for the difference of two proportions in "proc freq" ?
新手问一个很基础的SAS code问题请问统计上看两组数字是不是一一对应相等的问题(aggrement/concordence analysis?)
请教:用SAS的哪个proc比较两组数据的proportion?A Sample Size Question (Binomial)
问一个underpower和predictive probability的问题sample size 的问题
菜鸟问个算样本量的问题讨论一下,非独立sample的显著性比较
相关话题的讨论汇总
话题: p2话题: p1话题: test话题: n1话题: use