Created
July 7, 2014 03:29
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quick binomial power calculations (simulated)
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| # power calculation examples | |
| get_power = function(truep, p0, n, alpha=0.05) { | |
| num_rejections = 0 | |
| for(i in 1:10000){ | |
| dat = rbinom(n, size=1, prob=truep) | |
| pv = 2*(1-pbinom(sum(dat), size=n, prob=p0)) | |
| if(pv < alpha) num_rejections = num_rejections + 1 | |
| } | |
| return(num_rejections / 10000) | |
| } | |
| get_power(0.7, 0.5, 10) | |
| get_power(0.7, 0.5, 100) |
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