Statistics - (Fraction|Ratio|Percentage|Share) (Variable|Measurement)
1 - About
Ratio is the deepest, most meaningful level of measurement, and consequently, the most useful.
Because of this absolute zero value ("true zero"), the ratio between any two values has a meaning
In the Celsius temperature scale the temperature at which water freezes is really an arbitrarily chosen number and does not represent the absence of temperature. As a result, the ratio between temperatures is relative.
A ratio must have meaning. A ratio between two nominal variables is meaningless (i.e. a person who scores A did not necessarily do “twice as well” as a student who scored B )
2 - Articles Related
3 - Type
Two type of ratio measure:
- Percentage measure
- Share measure
4 - Example
In each of these cases there is an absolute zero that has real meaning
- Population (Population = 0 = extinct)
- Age (Age = 0 literally means NO age)
- Temperature K° (the Kelvin scale)