Penicillin {mratios}

Comparing 6 strains with respect to production of antibiotics

Description

The production of antibiotics of 6 strains (mutants of the same micro organism) was compared. MO were put to holes in agar infected with Bacteria. The diameter of Baceria-free areas around the colonies of the MO was recorded. Each strain was repeated 8 times.

Usage

data(Penicillin)

Format

A data frame with 48 observations on the following 2 variables.

strain

a numeric veactor, the number identifying the strains

diameter

a numeric vector, size of the diameter of Bacteria-free area around each colony

Source

Horn, M, Vollandt, R (1995). Multiple Tests und Auswahlverfahren in Biomtrie (Lorenz, RJ, Vollmar, J, eds). Gustav Fischerverlag, Stuttgart Jena New York.

Examples

library(mratios)

data(Penicillin)

str(Penicillin)

boxplot(diameter ~ strain, data=Penicillin)