a researcher is interested in the relationship between leisure time physical activity, diet extracurricular activities and hours of sleep with cardiovascular fitness in children ages 6 through 12. She will recruit 100 children to participate in the study. cardiovascular fitness will be assessed via 6-minute walk test. Leisure time physical activity, diet, extracurricular activities and hours of sleep will be assessed through questionnaires completed by their parents

What type of variable is cardio vascular fitness in the question - Ration , Interval or Nominal ... what is your reason for the choice