I have read the R manual and help archives, sorry but I'm still stuck. 

How would I do a t-test with an adjusted p-value?

Suppose that I use t.test ( ) , with the function argument alternative = 
"two.sided",  and data such that degrees of freedom = 20.  The function 
calculates a t-statistic of 2.086, and p-value =0.05

How do I then adjust the p-value?  My thought is to do
p.adjust (pt(2.086, df=20),"BH") 
but that doesn't change anything (returns 0.975)

what is the procedure?  I'm sorry if there is a basic concept that I am 
missing here...








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