Actually when it comes to quantitative data, there are 4 levels, but who’s counting? (Besides Goldilocks.)

1. Nominal  (categorical) data are names or categories: (gender, religious affiliation, days of the week, yes or no, and so on)
2. Ordinal data are like the pain scale.  Each number is higher (or lower) than the next but the distances between numbers are not equal.  In others words 4 is not necessarily twice as much as 2; and 5 is not half of 10.
3. Interval data are like degrees on a thermometer.  Equal distance between them, but no actual “0”.  0 degrees is just really, really cold.
4. Ratio data are those  with real 0 and equal intervals (e.g., weight, annual salary, mg.)

(Of course if you want to collect QUALitative word data, that’s closest to categorical/nominal, but you don’t count ANYTHING.  More on that another time.)

CRITICAL THINKING:   Where are the levels in Goldilocks and the 3 levels of data at this link:  https://son.rochester.edu/research/research-fables/goldilocks.html ?? Would you measure soup, bed, chairs, bears, or other things differently?  Why was the baby bear screaming in fright?