Data Types and Levels of Measurement

The data that is collected will be of two different Data Types and 4 different Levels of Measurement.
Qualitative Data: names & similar
Quantitative Data: numbers, which can be discrete (only particular numbers) or continuous (any real number value).
The following video goes over the data types with examples and is about 6 minutes
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Data can be further sorted into Levels of Measurement:
Nominal: data can only be categorized, i.e. named
Ordinal: data can be ordered or ranked
Interval: data can be used for calculations, zero does not mean 'none'.
Ratio: data can be used for calculations, cannot be negative, zero means 'none'.
The following video goes over the level of measurement with examples and is about 8 minutes