Ill. At what level are the following variables measured? 1. Weights of a sample of bags of raw materials for the production of a certain product, measured in grams. 2. Students rated as superior, above average, average, below average, or poor. 3. The natural eye color of a sample of 100 children. 4. The economic status of a sample of families in a certain area. 5. The final grade of graduate students taking up Statistics. 6. The school in which a graduate student is enrolled in. 7. The birth order of children in the family