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Levels of measurement

posted Oct 21, 2009, 8:58 AM by Mandy Sladden   [ updated Feb 4, 2010, 5:22 AM by Prof Kiernan ]
Nominal Level of Measurement: categories that cannot be put in a universal, meaningful order.

Ordinal
Level of Measurement: categorical data that can be put in an order, but any numerical differences are meaningless.

Interval
Level of Measurement: numerical data with no natural starting point

Ratio
Level of Measurement: numerical data with a natural starting point.
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