Pollution index taken in three regions of the country

Source: R/BSDA-package.R

Data for Exercise 10.26

Region

Format

A data frame/tibble with 48 observations on three variables

pollution

pollution index

region

region of a county (west, central, and east)

ranks

ranked values of pollution

References

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

Examples


boxplot(pollution ~ region, data = Region, col = "gray")

anova(lm(pollution ~ region, data = Region))
#> Analysis of Variance Table
#> 
#> Response: pollution
#>           Df Sum Sq Mean Sq F value Pr(>F)
#> region     2  115.4  57.719  0.4224 0.6581
#> Residuals 45 6149.5 136.656