The Effect of Vitamin C on Tooth Growth in Guinea Pigs

The Effect of Vitamin C on Tooth Growth in Guinea Pigs

Usage

ToothGrowth

Format

A data frame with 60 rows and 6 variables:

ID

ID of the guinea pig

supp

Supplement type (VC: Vitamin C or OJ: Orange juice)

supp2

Transformation of the supplement type (factor to numerical: VC = 1; OJ = 2)

dose

Dose in grams / day

dose2

Dose in grams / day

len

Tooth length

logLen

Natural logarithm of the tooth length (len)