Question: 1. A researcher notes a relationship in a study between getting married and weight gain. What is an example of a possible confounding variable the

1. A researcher notes a relationship in a study between getting married and weight gain. What is an example of a possible confounding variable the researcher would want to control for? Why? (4 points) 2. Why does a voluntary response sample tend to introduce bias into the results of a study? (4 points) 3. What is a double-blind study and why are studies conducted this way? (4 points)

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