# NOT RUN { ## One sample (power) ## Exercise 2.5 p. 47 from Cohen (1988) pwr.t.test(d=0.2,n=60,sig.level=0.10,type="one.sample",alternative="two.sided") ## Paired samples (power) ## Exercise p. 50 from Cohen (1988) d<-8/(16*sqrt(2*(1-0.6))) pwr.t.test(d=d,n=40,sig.level=0.05,type="paired",alternative="two.sided") ## Two independent samples (power) ## Exercise 2.1 p. 40 from Cohen (1988) d<-2/2.8 pwr.t.test(d=d,n=30,sig.level=0.05,type="two.sample",alternative="two.sided") ## Two independent samples (sample size) ## Exercise 2.10 p. 59 pwr.t.test(d=0.3,power=0.75,sig.level=0.05,type="two.sample",alternative="greater") # }
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