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In mathematics, a variable is a representation, in the form of a letter, of a numerical value. Variables are traditionally used when the value it represents is either unknown or can vary.
1. (used with a sing. verb) The mathematics of the collection, organization, and interpretation of numerical data, especially the analysis of population characteristics by inference from sampling.2. (used with a pl. verb) Numerical data.
Ration- the highest level of measurement in terms of statistics which it is an absolute zero, and It is under the quantitative variable(numerical).
Everybody who gives a numerical answer to a sum involving π. The exact value cannot be calculated and so approximations must be used.
A parameter can be thought of as a constant variable. It is a variable for which you determine a value, or whose value you change to see its effects on the situation modeled. The term is used in Geometry, Statistics, Physics and Engineering nas well as other fields.