ructure.com/courses/8311/quizzes/54149/take O the risk of premature death at the

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ructure.com/courses/8311/quizzes/54149/take O the risk of premature death at the beginning of the study for those in the study O the risk of premature death for people who sleep less than five hours a night. Question3 1 pts Suppose you were to read about a study showing that people who sleep less than five hours a night have twice as much risk of a premature death as people who sleep seven or eight hours a night. Which of the following is not an example of a possible "confounding variable" in this study? O The amount of alcohol a person drinks in the evening Medications a person is taking. The amount of sleep a person gets per night. The amount of stress a person is under in their work. Queston 4

Explanation / Answer

A confounding variable is an external cause that may affect the outcome / response variable in a study. In this case, alcohol consumption, medication and stress at work are external causes that can result in premature death. The amount of sleep a person gets at night is the predictor variable of this study and hence, it is not a confounding variable (it is not a hidden variable)

So, the answer is: The amount of sleep a person gets per night

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