What are the independent, dependent, and control variables

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What was the independent variable?

Ages of the students. Different ages were tested by the scientist

What was the dependent variable?

    The time it to put the puzzle together. The time was observed and measured by the scientist
       What was a controlled variable?
        Same puzzle. All of the participants were tested with the same puzzle. It would not have been a fair test if some had an easy 30 piece puzzle and some had a harder 500 piece puzzle.

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        WnpxfbaBxr (231)
        Duke University

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