Levels of measurement

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Levels of measurement refer to how a variable can be quantified (thus, measured). Four are the possible levels of measurement:

• nominal (which may be referred to as nominal measure, nominal level of measurement or nominal scale)
• ordinal (which may be referred to as ordinal measure, ordinal level of measurement or ordinal scale)
• interval (which may be referred to as interval measure, interval level of measurement or interval scale)
• ratio (which may be referred to as ratio measure, ratio level of measurement or ratio scale)

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Wikipedia - Level of measurement

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JDPerezgonzalez

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