R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(26,20,19,19,20,25,25,22,26,22,17,22,19,24,26,21,13,26,20,22,14,21,7,23,17,25,25,19,20,23,22,22,21,15,20,22,18,20,28,22,18,23,20,25,26,15,17,23,21,13,18,19,22,16,24,18,20,24,14,22,24,18,21,23,17,22,24,21,22,16,21,23,22,24,24,16,16,21,26,15,25,18,23,20,17,25,24,17,19,20,15,27,22,23,16,19,25,19,19,26,21,20,24,22,20,18,18,24,24,22,23,22,20,18,25,18,16,20,19,15,19,19,16,17,28,23,25,20,17,23,16,23,11,18,24,23,21,16,24,23,18,20,9,24,25,20,21,25,22,21,21,22,27,24,24,21,18,16,22,20,18,20)
> par3 = '20'
> par2 = '0.95'
> par1 = 'two.sided'
> par3 <- '20'
> par2 <- '0.95'
> par1 <- 'two.sided'
> #'GNU S' R Code compiled by R2WASP v. 1.2.327 ()
> #Author: root
> #To cite this work: Wessa P., 2013, One Sample Tests about the Mean (v1.0.3) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_onesampletests_mean.wasp/
> #Source of accompanying publication: 
> #
> par2 <- as.numeric(par2)
> par3 <- as.numeric(par3)
> (tt <- t.test(x,mu=par3,alternative=par1,conf.level=par2))

	One Sample t-test

data:  x
t = 2.2343, df = 161, p-value = 0.02684
alternative hypothesis: true mean is not equal to 20
95 percent confidence interval:
 20.07456 21.20939
sample estimates:
mean of x 
 20.64198 

> 
> #Note: the /var/fisher/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab
> load(file="/var/fisher/rcomp/createtable")
> 
> a<-table.start()
> a<-table.row.start(a)
> a<-table.element(a,'One Sample t-test',2,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'H0',header=TRUE)
> a<-table.element(a,tt$null.value)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Alternative',header=TRUE)
> a<-table.element(a,tt$alternative)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'CI',header=TRUE)
> a<-table.element(a,par2)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Sample Mean',header=TRUE)
> a<-table.element(a,mean(x))
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'T-Test',header=TRUE)
> a<-table.element(a,tt$statistic)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'DF',header=TRUE)
> a<-table.element(a,tt$parameter)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'P-Value',header=TRUE)
> a<-table.element(a,tt$p.value)
> a<-table.row.end(a)
> a<-table.end(a)
> table.save(a,file="/var/fisher/rcomp/tmp/1gsu31383155992.tab") 
> 
> 
> 
> proc.time()
   user  system elapsed 
  0.329   0.075   0.380