R: Effect size calculation for proportions

ES.h {pwr} | R Documentation

## Effect size calculation for proportions

### Description

Compute effect size h for two proportions

### Usage

    ES.h(p1, p2)

### Arguments

`p1` | First proportion
`p2` | Second proportion

### Details

The effect size is 2*asin(sqrt(p1))-2*asin(sqrt(p2))

### Value

The corresponding effect size

### Author(s)

Stephane CHAMPELY

### References

Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale,NJ: Lawrence Erlbaum.

### See Also

pwr.p.test, pwr.2p.test, pwr.2p2n.test, power.prop.test

### Examples

    ## 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")

[Package pwr version 1.2-2 Index]