For the example of comparing birth rates among two states, North Dakota (16 births per 1,000 people) and Pennsylvania (10 births per 1,000), which of the following is the most important confounding variable?

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Quizplus · Accepted Answer

In this case, the normalization of the population allows us to remove age, which is a confounding variable, a variable that masks the true findings.

For the Example of Comparing Birth Rates Among Two States