In an Experiment, the Purpose for Manipulating the Independent Variable

question 33

Multiple Choice

In an experiment, the purpose for manipulating the independent variable is to help ____.

• A) establish the direction of the relationship by showing that the dependent variable changes when you manipulate the independent variable
• B) eliminate the third variable problem because you decide when to manipulate rather than waiting for the variable to change
• C) establish the direction of the relationship and help eliminate the third variable problem
• D) ensure that any effects of selection bias or other randomization failures are minimized

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