Definition of Ratio Scale

A variable measurement scale that is quantitative with a true zero and equal intervals between adjacent points. Unlike an interval scale, a zero on a ratio scale means that the variable being measured is completely absent. The ratio scale enables the researchers to compare intervals. These are the most informative scales as they indicate the order and number of objects between the scale values. It has the following properties:


  • As already mentioned, the ratio scale has the property of absolute zero.
  • Unlike the interval scale, the negative numbers are not present in a ratio scale because of the absolute characteristic of 0.
  • The ratio scale offers unique opportunities for statistical analysis.

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