作者ilovecanna (女儿)
看板Statistics
标题[问题] 请教关於R的Two Sample t-test
时间Sat Mar 29 16:24:17 2008
请教各位,
> t.test(uf,um,data=roomwidth,var.equal=TRUE)
Two Sample t-test
data: uf and um
t = -2.6147, df = 111, p-value = 0.01017
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
-15.572734 -2.145052
sample estimates:
mean of x mean of y
43.69565 52.55455
今天我做uf and um的t-test,从资料上看来是要做uf是否等於um的检定,
(也就是uf-um=0)
那今天我希望我的H0:uf=um
H1:um>uf
我该怎麽做呢?
以上是我的理解,如果我的理解有误或是观念不对也请纠正我,先谢谢各位了
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1F：推 bugle:alternative="greater" 03/29 18:39