|
|
|
|
|
|
| similarities and differences |
|
|
|
|
| rank order |
|
|
|
|
| magnitude of differences |
|
|
||
| ratios & meaningful zero point |
|
|||
|
|
Nominal | Ordinal | Interval | Ratio |
| change labels in any way that keeps the same-vs.-different relationships intact |
|
|||
| make any change that preserves order information |
|
|
||
| add a constant |
|
|
|
|
| multiply by a positive constant |
|
|
|
|