# discrete variable

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Related to discrete variable: Continuous variable, Discrete Random Variable

## dis·crete var·i·a·ble

a variable that may assume only a countable (usually finite) number of values.

## variable

1. any type of measurement, quantitative or qualitative, of which a series of individual observations is made so that it has, as a principal characteristic, the potential for variability.

2. has the quality of variability.

**variable agent**

an agent in the cause of a disease which is capable of variation in intensity, e.g. weather, as contrasted to one that is not variable, e.g.

*Salmonella dublin*.**concomitant v's**

in experimental design these refer to factors that affect the dependent variable, but are not themselves influenced by the treatment (e.g. age of animal). The effect of concomitant variables can be removed by suitable experimental design or by including them in the model.

**continuous variable**

one in which all values within a given range are possible, e.g. birth weights of calves.

**variable costs**

costs which vary with the dimensions of the activity. Includes seed, fertilizer, teat dip, worm drench. Called also direct costs. See also fixed costs.

**dependent variable**

1. in statistics the variable predicted by a regression equation.

2. a variable which depends on other variables for its value.

**discontinuous variable**

see discrete variable (below).

**discrete variable**

one in which the possible values are not on a continuous scale, e.g. the number of sheep in a flock.

**endogenous variable**

dependent variable.

**exogenous variable**

independent or predetermined variable.

**independent variable**

one not dependent on other variables but capable of affecting dependent variables, thus an input variable.

**spatial variable**

a measurement relating to area or location.

**temporal variable**

one relating to chronological time.

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