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what is meant by dependent and independent variable?

what is meant by dependent and independent variable?

Math   Statistics-And-Probability   
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Independent Variable:-

An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.

Dependent Variable:-

A dependent variable is the variable being tested and measured in a scientific experiment.

The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variable is observed and recorded.

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