Allergy medicines by adverse events

Data used in Exercise 8.22

Allergy

Format

A data frame/tibble with 406 observations on two variables

event

a factor with levels insomnia, headache, and drowsiness

medication

a factor with levels seldane-d, pseudoephedrine, and placebo

Source

Marion Merrel Dow, Inc. Kansas City, Mo. 64114.

References

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

Examples

T1 <- xtabs(~event + medication, data = Allergy)
T1
#>             medication
#> event        seldane-d pseudoephedrine placebo
#>   insomnia          97              77      12
#>   headache          65              49      43
#>   drowsiness        27              14      22
chisq.test(T1)
#> 
#> 	Pearson's Chi-squared test
#> 
#> data:  T1
#> X-squared = 37.832, df = 4, p-value = 1.213e-07
#>