[R] pvalue calculate
Peter Ehlers
ehlers at ucalgary.ca
Mon Jul 23 00:17:08 CEST 2012
On 2012-07-22 13:09, Henrik Singmann wrote:
> Hi Mary,
>
> I think the good old t-test is what you want:
Maybe, but calculating p-values with absolutely no consideration
of assumptions is pure folly. It may well be that Mary has some
assumptions in mind, but the way the question was posed does not
instil confidence in that assumption.
Peter Ehlers
>
> x <- sample(1:50)
>
> t.test(x, mu = 300)
>
> gives:
> One Sample t-test
>
> data: x
> t = -133.2, df = 49, p-value < 0.00000000000000022
> alternative hypothesis: true mean is not equal to 300
> 95 percent confidence interval:
> 21.36 29.64
> sample estimates:
> mean of x
> 25.5
>
> Best,
> Henrik
>
>
> Am 22.07.2012 21:37, schrieb Mary Kindall:
>> I have a value
>> a=300
>>
>> observation (x) = sample(1:50)
>>
>> How to find a p-value from this. I need to show that "a" is different fom
>> mean(x).
>> Thanks
>>
>
More information about the R-help
mailing list