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Variable - Wikipedia, the free encyclopedia
Variable may refer to: • Variable (mathematics), a symbol that stands for a value that may vary • Variable (programming), a symbolic name associated with a value and whose associated value may be cha...
en.wikipedia.org/wiki/Variable |
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Dependent and independent variables - Wikipedia, the free encyclopedia
The terms " dependent variable " and " independent variable " are used in similar but subtly different ways in mathematics and statistics as part of the standard terminology in those subjects. The...
en.wikipedia.org/wiki/Dependent_and_independent_variabl... en.wikipedia.org/wiki/Dependent_and_independent_variables |
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We will distinguish three different kinds of variables. Many more are possible, but for our purposes this will be sufficient. ... Latent Variables: These are the theoretical dependent and independent variables that you wish to measure.
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Variables are usually denoted by a single Roman or Greek letter, e.g. $x$ , although sometimes a whole word or phrase can be used also. ... (iii) As ``formal'' variables. For instance, we may talk about a formal polynomial $p(x) = 1 + x + x^2$ . This is similar to sense (ii), but is not exactly the same. The variable $x$
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Some variables can be quite concrete such as gender, birth order, weight, or shoe size. Others can be considerably more abstract, vague, and squishy. For exmaple, sense of well being, self-esteem, strength of belief in religion, or IQ.
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a measurable quantity which at every instant has a definite numerical value. If there is any doubt whether a particular quantity may be admitted as a variable, use the criterion whether it can be represented by a pointer on a dial. ... Pressure, angle, electric potential, Eddington's statement on the subject is explicit:
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