A researcher collected the following sets of data while investigating young people's health behaviours:
-
- The percentage of adolescents who exercised at least three times per week
- Patient identification numbers from a youth mental health clinic database
- Daily caloric intake recorded by teenagers in a nutrition study
- BMI measurements of all individual participants
Which combination correctly identifies all the quantitative data sets?
- 1 and 2
- 1, 2 and 3
- 1, 3 and 4
- 3 and 4