`R/BSDA-package.R`

`Concrete.Rd`

Data for Example 7.17

`Concrete`

A data frame/tibble with 20 observations on two variables

- strength
comprehensive strength (in pounds per square inch)

- method
factor with levels

`new`

and`old`

indicating the method used to construct a concrete block

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

```
wilcox.test(strength ~ method, data = Concrete, alternative = "greater")
#> Warning: cannot compute exact p-value with ties
#>
#> Wilcoxon rank sum test with continuity correction
#>
#> data: strength by method
#> W = 81, p-value = 0.0104
#> alternative hypothesis: true location shift is greater than 0
#>
```