If you are talking about math wise then an example of a variable would be any letter in the alphabet. For example in the expression "x-3m" m and x are variables.
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An variable in science something that can be changed and example is facts and figures .
The dependent variable is the variable in the experiment that changes. For example if you were trying to figure out which of the three fertilizers works the best on flowers your dependent variable would be the fertilizer and the independent variable would be the flowers. If that doesn't help go to factmonster.com
Yes. It is a continuous variable. As used in probability theory, it is an example of a continuous random variable.
Ordinal.
A real life example of a variable is If one were to measure the influence of different quantities of fertilizer on plant growth, the independent variable would be the amount of fertilizer used (the changing factor of the experiment).hahahehe Yahoo answeres.com