age
: age of primary beneficiary.
bmi
: body mass index, providing an understanding of body, weights that are relatively high or low relative to height, objective index of body weight (kg / m ^ 2) using the ratio of height to weight, ideally 18.5 to 24.9.
children
: Number of children covered by health insurance / Number of dependents.
smoker
: Smoking as a factor with 2 levels, yes, no.
gender
: insurance contractor gender, female, male.
region
: the beneficiary's residential area in the US, northeast, southeast, southwest, northwest.
charge
: individual medical costs billed by health insurance.