1) Years of school completed. Zero is meaningful (you can have 0 education). 1. Nominal 2. Ordinal 3. Interval 4. Ratio g) Employment status 1. Nominal 2. Ordinal 3. Interval 4. Ratio h) Age of mother. Zero is not meaningful. 1. Nominal 2. Ordinal 3. Interval 4. Ratio Number of students in third grade. (You only can have whole number. You cannot have fraction). 1. Nominal 2. Ordinal 3. Interval 4. Ratio