Download and open the R Workspace file `BRFSS.RData` in R to answer the following questions. The dataset contains a sample of individuals in the US aged 18–64 who live in urban areas.

The description of the variables is as follows:

- **SEXVAR:** A value of 1 is assigned for Male and 2 for Female.
- **GENHLTH:** Would you say that in general your health is:
- 1 – Excellent
- 2 – Very good
- 3 – Good
- 4 – Fair
- 5 – Poor
- **SLEPTIM1:** On average, how many hours of sleep do you get in a 24-hour period?
- **chronic_disease:** Indicates if the individual declares having a chronic disease (heart attack, any type of cancer, or both).
- **X_RACEGR3:** Race/ethnicity category:
- 1 – White
- 2 – Black
- 3 – Other race, non-Hispanic
- 4 – Multiracial, non-Hispanic
- 5 – Hispanic
- 9 – Don’t know / Not sure / Refused to answer
- **exercise:** Dummy variable indicating adults who reported doing physical activity or exercise during the past 30 days other than their regular job:
- 1 – Had physical activity or exercise
- 0 – No physical activity or exercise in the last 30 days
- **X_AGE5YR:** Reported age in five-year age categories:
- 1 – 18-24
- 2 – 25-29
- 3 – 30-34
- 4 – 35-39
- 5 – 40-44
- 6 – 45-49
- 7 – 50-54
- 8 – 55-59
- 9 – 60-64
- **X_BMI5:** Body mass index (BMI)
- **X_BMI5CAT:** Four categories of Body Mass Index (BMI):
- 1 – Underweight (BMI < 18.50)
- 2 – Normal weight (18.50 ≤ BMI < 25.00)
- 3 – Overweight (25.00 ≤ BMI < 30.00)
- 4 – Obese (30.00 ≤ BMI < 99.99)
- **obese:** Dummy variable indicating if reported BMI corresponds to the obese category.
- **X_EDUCAG:** Level of education completed:
- 1 – Did not graduate High School
- 2 – Graduated High School
- 3 – Attended College or Technical School
- 4 – Graduated College or Technical School
- **smoke_drink:** Indicates if an adult is a current smoker, heavy drinker (adult men having more than 14 drinks per week and adult women having more than 7 drinks per week), or both.