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2.3 Levels(Scales) of Measurements

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Measurement Scales

- ratios of numbers do reflect ratios of magnitudes
Ratio

-the difference (or interval) between numbers
on the scale reflects a difference in magnitude.
Interval
(Ratios of magnitudes are not meaningful)

-ranking observations in terms of size
Ordinal or magnitude

- observations are labeled and categorized.
Norminal
3 Properties
- Comparative
- Additive
- Multiplicative 20