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Nominal
Organized by names, labels, quanities
Ordinal
Organized by order and ranks
Interval
# that are calculated and can't start at zero
Ratio
# that are able to start at zero
Nominal
SSN, Name, Jersey #, eye color
Ordinal
Letter grade, pg #, condition, rating, color
Interval
SAT score, Date, IQ, Year, Temperature
Ratio
Height, Age, Weight, Distance, Time
