Three samples to illustrate analysis of variance

Data used in Exercise 10.1

Abc

Format

A data frame/tibble with 54 observations on two variables

response

a numeric vector

group

a character vector A, B, and C

References

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

Examples

boxplot(response ~ group, col=c("red", "blue", "green"), data = Abc )

anova(lm(response ~ group, data = Abc))
#> Analysis of Variance Table
#> 
#> Response: response
#>           Df Sum Sq Mean Sq F value  Pr(>F)  
#> group      2 1068.6  534.28  2.9606 0.06132 .
#> Residuals 48 8662.4  180.47                  
#> ---
#> Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1