Illustrates the Wilcoxon Rank Sum test

Data for Exercise 7.65

Skewed

Format

A data frame/tibble with 21 observations on two variables

C1

values from a sample of size 16 from a particular population

C2

values from a sample of size 14 from a particular population

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples

boxplot(Skewed$C1, Skewed$C2, col = c("pink", "lightblue"))

wilcox.test(Skewed$C1, Skewed$C2)
#> Warning: cannot compute exact p-value with ties
#> 
#> 	Wilcoxon rank sum test with continuity correction
#> 
#> data:  Skewed$C1 and Skewed$C2
#> W = 266.5, p-value = 0.07156
#> alternative hypothesis: true location shift is not equal to 0
#>