The Ninth Amendment states that the list of rights enumerated in the Constitution is not exhaustive, and that the people retain all rights not enumerated. The Tenth Amendment assigns all powers not delegated to the United States, or prohibited to the states, to either the states or to the people.
Many of our standardized tests in psychology use interval scales. An IQ (Intelligence Quotient) score from a standardized test of intelligences is a good example of an interval scale score. IQ scores are derived from a lengthy testing process that requires the participant to complete a number of cognitive tasks.
The ratio scale of measurement is the most informative scale. It is an interval scale with the additional property that its zero position indicates the absence of the quantity being measured. You can think of a ratio scale as the three earlier scales rolled up in one. Like a nominal scale, it provides a name or category for each object (the numbers serve as labels).