CLASS: SOCIOLOGYDATE: 24th August 2010

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4 types of measurement scales:

Nominal: discrete scale. Variable which describes a category/quality. E.g. gender, True/False, race, status.

Ordinal: discrete scale. Order categories that can be placed in rank order. E.g. age, position, exam grades.

Interval: Cardinal scale. Both discrete and continuous. Ratio: Cardinal scale. Both discrete and continuous.

They measure a specific amount (exact amount). However in a ratio scale, the minimum is zero and represents a true zero.

True zero: E.g. a person has no money.