Questions: Part 2 of 7 Points: 0 of 1 Save Researchers wanted to determine if having a television (TV) in the bedroom is associated with obesity. The researchers administered a questionnaire to 358 twelve-year-old adolescents. After analyzing the results, the researchers determined that the body mass index of the adolescents who had a TV in their bedroom was significantly higher than that of the adolescents who did not have a TV in their bedroom. Complete parts (a) through (e). (a) Why is this an observational study? What type of observational study is this? Why is this an observational study? A. It is not an observational study. B. This is an observational study because the researchers try to influence the outcome of the study. C. This is an observational study because the researchers observe the behavior of the individuals in the study without trying to influence an explanatory variable of the study. What type of observational study is this? A. Case-control study B. Cross-sectional study C. Cohort study Clear all

Part 2 of 7 Points: 0 of 1 Save Researchers wanted to determine if having a television (TV) in the bedroom is associated with obesity. The researchers administered a questionnaire to 358 twelve-year-old adolescents. After analyzing the results, the researchers determined that the body mass index of the adolescents who had a TV in their bedroom was significantly higher than that of the adolescents who did not have a TV in their bedroom. Complete parts (a) through (e). (a) Why is this an observational study? What type of observational study is this? Why is this an observational study? A. It is not an observational study. B. This is an observational study because the researchers try to influence the outcome of the study. C. This is an observational study because the researchers observe the behavior of the individuals in the study without trying to influence an explanatory variable of the study. What type of observational study is this? A. Case-control study B. Cross-sectional study C. Cohort study Clear all
Transcript text: Part 2 of 7 Points: 0 of 1 Save Researchers wanted to determine if having a television (TV) in the bedroom is associated with obesity. The researchers administered a questionnaire to 358 twelve-year-old adolescents. After analyzing the results, the researchers determined that the body mass index of the adolescents who had a TV in their bedroom was significantly higher than that of the adolescents who did not have a TV in their bedroom. Complete parts (a) through (e). (a) Why is this an observational study? What type of observational study is this? Why is this an observational study? A. It is not an observational study. B. This is an observational study because the researchers try to influence the outcome of the study. C. This is an observational study because the researchers observe the behavior of the individuals in the study without trying to influence an explanatory variable of the study. What type of observational study is this? A. Case-control study B. Cross-sectional study C. Cohort study Clear all
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Solution

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Solution Steps

Step 1: Determine if the study is observational

The study is observational because the researchers did not manipulate any variables or attempt to influence the outcome. Instead, they observed the behavior (having a TV in the bedroom) and its association with obesity (body mass index) in the adolescents. This aligns with option C: "This is an observational study because the researchers observe the behavior of the individuals in the study without trying to influence an explanatory variable of the study."

Step 2: Identify the type of observational study

The study is a cross-sectional study because the researchers collected data at a single point in time. They administered a questionnaire to the adolescents and analyzed the results without following the participants over time. This matches option B: "Cross-sectional study."

Final Answer

  • Why is this an observational study?
    \\(\boxed{\text{C. This is an observational study because the researchers observe the behavior of the individuals in the study without trying to influence an explanatory variable of the study.}}\\)

  • What type of observational study is this?
    \\(\boxed{\text{B. Cross-sectional study}}\\)

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