2. A Few Keywords and Definitions for Understanding Statistics – III (contd.)
(6 minutes read) - By Dr. Prafulla Dikshit 2.7 Four Levels of Measurement So far, we have seen how the continuity versus disjointedness of data points, can be the greatest differentiator between different types of data. We can also look at types of data from a measurement level perspective to get a very relevant view of data types. There are broadly four levels of measurement: 2.7.1 Nominal – A nominal level of data measurement is at the most a categorization. Importantly, the categories are not ordered . For example, if 'place of birth' is a variable we are interested in, the data we collect is nominal, since we may categorize the participants by place of birth, but we can't order it to say that this one, say London, or that, like Tokyo, is the best 'place of birth' and then another one, and then another and so on. Similarly, we can categorize people by race or color of skin but c...