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yzdbiomed

金虫 (正式写手)

[交流] 【求助】数据统计分析 已有1人参与

数据请见
http://d.namipan.com/d/ccd6126dc ... 2a364fe4be6de000000

我的目的是要计算第一列与其它各列的差异,请问应如何作统计分析?
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yzdbiomed

金虫 (正式写手)

经正态分布检测(shapiro.test),只有第二列和第六列数据不符正态分布。因而用t检验不合适,但用wilcox.test检测了一下,但出现了警告信息”In wilcox.test.default(A, B[, 1]) : cannot compute exact p-value with ties“,不知道相应的结果还对不对,请高手指正!(A为数据的第一列, B 1-5为数据的第2-6列)

> wilcox.test(A,B[,1])

        Wilcoxon rank sum test with continuity correction

data:  A and B[, 1]
W = 49, p-value = 0.00184
alternative hypothesis: true location shift is not equal to 0

Warning message:
In wilcox.test.default(A, B[, 1]) : cannot compute exact p-value with ties
> wilcox.test(A,B[,2])

        Wilcoxon rank sum test with continuity correction

data:  A and B[, 2]
W = 49, p-value = 0.002045
alternative hypothesis: true location shift is not equal to 0

Warning message:
In wilcox.test.default(A, B[, 2]) : cannot compute exact p-value with ties
> wilcox.test(A,B[,3])

        Wilcoxon rank sum test with continuity correction

data:  A and B[, 3]
W = 49, p-value = 0.002045
alternative hypothesis: true location shift is not equal to 0

Warning message:
In wilcox.test.default(A, B[, 3]) : cannot compute exact p-value with ties
> wilcox.test(A,B[,4])

        Wilcoxon rank sum test with continuity correction

data:  A and B[, 4]
W = 49, p-value = 0.002045
alternative hypothesis: true location shift is not equal to 0

Warning message:
In wilcox.test.default(A, B[, 4]) : cannot compute exact p-value with ties
> wilcox.test(A,B[,5])

        Wilcoxon rank sum test with continuity correction

data:  A and B[, 5]
W = 49, p-value = 0.00184
alternative hypothesis: true location shift is not equal to 0

Warning message:
In wilcox.test.default(A, B[, 5]) : cannot compute exact p-value with ties

[ Last edited by yzdbiomed on 2010-9-19 at 18:14 ]
2楼2010-09-19 17:58:50
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yzdbiomed

金虫 (正式写手)

请高手相助!
3楼2010-09-19 17:59:15
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