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Compute effect size h for two proportions
ES.h(p1, p2)
First proportion
Second proportion
The corresponding effect size
The effect size is 2*asin(sqrt(p1))-2*asin(sqrt(p2))
Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale,NJ: Lawrence Erlbaum.
pwr.p.test, pwr.2p.test, pwr.2p2n.test, power.prop.test
# NOT RUN { ## Exercise 6.5 p. 203 from Cohen h<-ES.h(0.5,0.4) h pwr.p.test(h=h,n=60,sig.level=0.05,alternative="two.sided") # }
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