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p_value<-function(cdf,x,parament=numeric(0),side=0){n<-length(parament)p<-switch(n+1,cdf(x),cdf(x,parament),cdf(x,parament[1],parament[2]),cdf(x,parament[1],parament[2],parament[3]))if(side<0) pelse
if (side>0) 1-pelse if(p<0.5) 2*p else
2*(1-p)}mean.test1<-function(x,mu=0,sigma=-1,side=0){n<-length(x)xb<-mean(x)if(sigma>0){z<-(xb-mu)/(sigma/sqrt(n))p<-p_value(pnorm,z,side=side)data.frame(mean=xb,df=n,Z=z,p_value=p)}else{t<-(xb-mu)/(sd(x)/sqrt(n))p<-p_value(pt,t,parament=n-1,side=side)data.frame(mean=xb,df=n-1,T=t,p_value=p)}} |
原文地址：http://www.cnblogs.com/colipso/p/3738478.html
