measurement scale

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Any of the available ways to categorize data is called a measurement scale. Available ways include the dichotomous scale, either of two alternatives, positive or negative; the nominal scale, which arranges data into unordered categories, such as race, religion, country of birth; the ordinal scale, in which data are arranged in ordered qualitative categories, such as income levels or socioeconomic status; the interval scale, which arranges data on a quantitative basis at specified systematic intervals, such as Celsius or Fahrenheit temperature scales, ages, or dates of birth; and the ratio scale, in which values run from one fixed point to another, e.g., zero to infinity, that is used to measure and compare heights, weights, blood pressure, and some other variables.

Subjects: Public Health and Epidemiology.

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