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 a 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 are the dependent variables, difference/relationship, and independent variables. And Why?