[R] How to calculate chi sqaure value from statistical value and degrees of freedom?

[Rui Barradas]

Hello,

You are computing the lower tail value, for chi-squared tests it's 
probably the upper tail you want.

p.val1 <- 1 - pchisq(Stat, df)
p.val2 <- pchisq(Stat, df, lower.tail=FALSE)
p.val1 == p.val2

Hope this helps,

Rui Barradas

Em 06-06-2012 02:31, Manish Gupta escreveu:
> Hi,
>
> My input is chi square statistical value and degrees of freedom. But i m
> getting different p values with the above formula.
>
> I double checked my values with the below calculator.
>
> http://vassarstats.net/tabs.html#csq
>
> Pls help me out.
>
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