1. Number of bicycle sold in one year by a large part in sports goods store. 2. Colors of baseball caps in a store. 3. Time to cut a lawn 4. classification of children in a day care center (infant, toddler, preschool) 5. Weight of a fish caught in the red sea 6. Marital status of factory members in a large university 7. Application forms 8. Closed-ended questionnaires 9. Diary accounts 10. IQ test 11. Document Review 12. Unstructured interview 13. Measurements 14. Unstructured observation 15. open-ended questionnaires
