Statistikkoderi R - Necessary R-commands - Introduktion til statistik PDF

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statistik koder i Rmeanmean()#standard deviationsd()#variancevar()#covariancecov(,)#correlationcor(,)plotplot()#quantilesquantile()#histogramhist()#sum of ....sum()#pdf, cdf, quantile and RNG for binom distribution (x=mængde, n=træk,p=sandsynlighed)dbinom(x,n,p)pbinom(x,n,p)qbinom(x,n,p)rbinom(x,n,p...

Description

statistik koder i R # mean mean()

#standard deviation sd()

#variance var()

#covariance cov(,) #correlation cor(,) # plot plot()

#quantiles quantile()

#histogram hist()

#sum of .... sum()

#pdf, cdf, quantile and RNG for binom distribution (x=mængde, n=træk,p=sandsynlighed) dbinom(x,n,p) pbinom(x,n,p)

qbinom(x,n,p) rbinom(x,n,p)

#pdf, cdf, quantile and RNG for normal distribution dnorm() pnorm() qnorm() rnorm()

#pdf, cdf, quantile and RNG for t distribution dt() pt() qt() rt()

#pdf, cdf, quantile and RNG for ki distribution dchisq() pchisq() qchisq() rchisq()

#pdf, cdf, quantile and RNG for poisson distribution (x=mængde, lambda=frekvens) dpois(x,lambda) ppois(x,lambda) qpois(x,lambda) rpois(x,lambda)

#pdf, cdf, quantile and RNG for hypergeometric distribution (x=mængden, n=træk, a=antal successer, N=populationsstørrelse) dhyper(x,a,N-a,n)

phyper(x,a,N-a,n) qhyper(x,a,N-a,n) rhyper(x,a,N-a,n)

#pdf, cdf, quantile and RNG for log-normal distribution dlnorm() plnorm() qlnorm() rlnorm()

#pdf, cdf, quantile and RNG for exponential distribution dexp() pexp() qexp() rexp()

#pdf, cdf, quantile and RNG for uniform distribution dunif() punif() qunif() runif()

#pdf, cdf, quantile and RNG for f distribution df() pf() qf() rf()

# P(>x) for n 1-pt(x,df=n-1)

# p(z>x) 1-pnorm(x) # P(t>x) for n-værdierne 100,200,....500 1-pt(x,df=seq(99,499,by=100)) # p(t>x) for n-værdierne n,.....y*n 1-pt(x,df=seq(n-1,y*n-1,by=n)) # standard normal n% fraktilen qnorm(n) #t-fraktilerne for n-værdierne n,....y*n til z decimaler round(qt(0.975,df=seq(n-1,y*n-1,by=n)),z)

kritisk værdi for en t-test med alpha 5% qt(1-alpha/2,df=n-1)

# en-prøve t-test og p-værdi for en to-sidet hypotese U=U0 tobs...