[R] How to search t value when you know degree of freedom?

[vod vos]

If we want to get 95% limit of t value, the result will be

pt(0.975, 29)  =  2.045

is that right?


 ---- On 星期三, 22 二月 2017 08:04:36 -0800 Rui Barradas <ruipbarradas at sapo.pt> wrote ---- 
 > Hello, 
 >  
 > It would be ?pt not pnorm. 
 > And as you can see in that help page you need another value, the value  
 > of the quantile. (Don't worry about the arguments ncp or log just q and df) 
 >  
 > Hope this helps, 
 >  
 > Rui Barradas 
 >  
 > Em 22-02-2017 15:53, vod vos escreveu: 
 > > 
 > > Hi everyone, 
 > > 
 > > How to search t value when you know degree of freedom? 
 > > 
 > > For example, the degree of freedom is 29, how to use R to calculate the t value for it? 
 > > 
 > > t.test does not help, or pnorm? I am not sure. 
 > > 
 > > Thanks. 
 > > 
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 >