R version 2.11.1 (2010-05-31)
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ISBN 3-900051-07-0

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> par6 = '21'
> par5 = '0.05'
> par4 = '20'
> par3 = '20,21'
> par2 = '13'
> par1 = '98'
> #'GNU S' R Code compiled by R2WASP v. 1.0.44 ()
> #Author: Prof. Dr. P. Wessa
> #To cite this work: AUTHOR(S), (YEAR), YOUR SOFTWARE TITLE (vNUMBER) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_YOURPAGE.wasp/
> #Source of accompanying publication: Office for Research, Development, and Education
> #Technical description: Write here your technical program description (don't use hard returns!)
> par1<-as.numeric(par1)
> par2<-as.numeric(par2)
> par3<-as.numeric(par3)
Warning message:
NAs introduced by coercion 
> par4<-as.numeric(par4)
> par5<-as.numeric(par5)
> par6<-as.numeric(par6)
> c <- 'NA'
> csn <- abs(qnorm(par5))
> if (par3 == par4)
+ {
+ conclusion <- 'Error: the null hypothesis and sample mean must not be equal.'
+ }
Error in if (par3 == par4) { : missing value where TRUE/FALSE needed
Execution halted