• age: This is an integer indicating the age of the primary beneficiary (excluding
those above 64 years, since they are generally covered by the government).
• sex: This is the policy holder's gender, either male or female.
• bmi: This is the body mass index (BMI), which provides a sense of how over
or under-weight a person is relative to their height. BMI is equal to weight (in
kilograms) divided by height (in meters) squared. An ideal BMI is within the
range of 18.5 to 24.9.
• children: This is an integer indicating the number of children / dependents
covered by the insurance plan.
• smoker: This is yes or no depending on whether the insured regularly
smokes tobacco.
• region: This is the beneficiary's place of residence in the U.S., divided into
four geographic regions: northeast, southeast, southwest, or northwest.