Allergy {gpk} | R Documentation |
Allergy Data Set
Description
Cosmetic products can cause allergenic response in users. Such a development can do significant harm to the name of its producer. Hence it is routine to carry out safety tests. In a study to compare irritability of 4 products, seven individuals were asked to apply each product on forearm. Higher the irritation score worse is the product.
Warning: since observations on the same individual are correlated, use of ANOVA may not be valid.
Usage
data(Allergy)
Format
A data frame with 7 observations on the following 4 variables.
ProdA
Irritation score for product A
ProdB
Irritation score for product B
ProdC
Irritation score for product C
ProdD
Irritation score for product D
Details
Cosmetic products can cause allergenic response in users. Such a development can do significant harm to the name of its producer. Hence it is routine to carry out safety tests. In a study to compare irritability of 4 products, seven individuals were asked to apply each product on forearm. Higher the irritation score worse is the product. Warning: since observations on the same individual are correlated, use of ANOVA may not be valid.
Source
http://ces.iisc.ernet.in/hpg/nvjoshi/statspunedatabook/databook.html
Examples
data(Allergy)
friedman.test(as.matrix(Allergy))