[R] results from t-test

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From: F. Patrick Graz (pgraz@polytechnic.edu.na)
Date: Sat 01 May 2004 - 23:40:54 EST


Message-id: <4093A8E6.3080209@polytechnic.edu.na>


Greetings,
I'm rather new to R, and only just subscribed to the mailing list.

I have run into a strange result in a t-test. The data represents the
the hypothetical differences obtained for a t-test for dependent samples.

All the numeric output looks OK, but the statement that the alternative
hypothesis is accepted seems rather strange.

> data <- c(-6,6,-4,11,6,-3,-12,7,-1,4)
> length(data)
> t.test (data,mu=0)

         One Sample t-test

data: data
t = 0.3548, df = 9, p-value = 0.7309
alternative hypothesis: true mean is not equal to 0
95 percent confidence interval:
  -4.300873 5.900873
sample estimates:
mean of x
       0.8

Can someone explain this? Beware though, I'm a forester and may not
understand too technical explanations.

Patrick



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