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Researchers were interested in examining the effect that being a parent has on life satisfaction. A random sample of 6906 U.S. adults collected over 20

Researchers were interested in examining the effect that being a parent has on life satisfaction. A random sample of 6906 U.S. adults collected over 20 years showed that parents had higher levels of life satisfaction than did nonparents.

Is this an observational study or an experiment?

Choice 1 of 2:Observational study Choice 2 of 2:Experiment

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