Serum Antigen Level — sal • exactRankTests

The response of serum antigen level to AZT in 20 patients suffering AIDS.

data(sal)

Format

A data frame with 20 observations on the following 2 variables.

pre: level pre treatment.
post: level post treatment.

Details

The data is given in Metha and Patel (2001), Table 8.1, page 181. Two-sided p-value for the Wilcoxon-Signed Rank Test: 0.0021 (page 183) or 0.0038 (asymptotically).

References

Cyrus R. Mehta & Nitin R. Patel (2001), StatXact-5 for Windows. Manual, Cytel Software Cooperation, Cambridge, USA

Examples

data(sal)
attach(sal)

wilcox.exact(pre, post, paired=TRUE, conf.int=TRUE)
#> 
#> 	Exact Wilcoxon signed rank test
#> 
#> data:  pre and post
#> V = 124, p-value = 0.002136
#> alternative hypothesis: true mu is not equal to 0
#> 95 percent confidence interval:
#>   54 292
#> sample estimates:
#> (pseudo)median 
#>         137.75 
#> 
wilcox.exact(pre,post, paired=TRUE, conf.int=TRUE, exact=FALSE)
#> 
#> 	Asymptotic Wilcoxon signed rank test
#> 
#> data:  pre and post
#> V = 124, p-value = 0.003783
#> alternative hypothesis: true mu is not equal to 0
#> 95 percent confidence interval:
#>   54.49998 281.50005
#> sample estimates:
#> (pseudo)median 
#>       137.2646 
#> 

detach(sal)