# Power analysis with R [closed]

I have two questions regarding the R script.

If I want to know the size of the sampling when I do a t-test with R, I can use this R script :

power.t.test(delta=1,sd=1.5,sig.level=0.05,power=0.8)


If I want to know the size of the sampling when I do the test of Pearson correlation coefficient, what is the R script?

And for a chi-square test what is the R script?

## closed as off-topic by Peter Flom♦, COOLSerdash, gung♦, Scortchi♦, Nick CoxJul 5 '13 at 0:14

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• You can look at the pwr package for one approach to these problems. – Gala Jul 4 '13 at 19:03
• The question could be migrated to SO, it has already received a full answer anyway. – Gala Jul 5 '13 at 7:10

pwr.r.test(n = , r = , sig.level = , power = )

pwr.chisq.test(w =, N = , df = , sig.level =, power = )