Quantitative variables are numerical variables that represent quantities or measurements. Examples of quantitative variables include:
1. Age (in years) 2. Height (in centimeters or inches) 3. Weight (in kilograms or pounds) 4. Income (in dollars) 5. Number of siblings (count) 6. Blood pressure (in millimeters of mercury) 7. Temperature (in degrees Celsius or Fahrenheit) 8. Test scores (out of 100)