Power analysis with R

Question

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?

You can look at the pwr package for one approach to these problems. — Gala, Jul 04 '13 at 19:03
The question could be migrated to SO, it has already received a full answer anyway. — Gala, Jul 05 '13 at 07:10

score 7 · Answer 1 · answered Jul 04 '13 at 19:05

7

For correlation:

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

and for chi-square

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

For others, see here

answered Jul 04 '13 at 19:05

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