Question

Researchers wanted to determine if having a television TV) in the bedroom is associated with obesity. The researchers administered a questionnaire to 353 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. 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. B. This is an observational study because the researchers try to influence the outcome of the study. C. It is not an observational study What type of observational study is this? A. Cross-sectional study B. Cohort study C. Case-control study (b) What is the response variable in the study? What is the explanatory variable? What is the response variable in the study? A. The response variable is the body mass index of the adolescents. B. The response variable is the number of the adolescents that participate in the study. C. The response variable is whether the adolescent has a TV in the bedroom or not.(c) Can you think of any lurking variables that may affect the results of the study?A. No, there are no lurking variables in this study.B. Yes, for example, possible lurking variables might be eating habits and amount of exercise per week.C. There is not enough information to answer the question.(d) In the report, the researcher stated " these results remain significant after adjustment for socio economic status." What this mean?A. It means that socioeconomic status is not an explanatory variables and that including this variable in the study does not change the result of the study.B. The researcher made an effort to avoid cofounding by accounting for potential lurking variables.C. It means that socioeconomic status is an explanatory variable and that including this variable in the study changes the results of the study.(e) Does a television in the bedroom cause a higher body mass index? ExplainA. Yes, television in the bedroom causes obesity because the body mass index of the adolscents who had a TV in their bedroom was significantly higher than that of the adolescents who did not have a TV in their bedroom.B. No, television in the bedroom causes obesity because the body mass index of the adolscents who had a TV in their bedroom was significantly higher than that of the adolescents who did not have a TV in their bedroom.
C. television in the bedroom does not cause obesity because the body mass index of the adolscents who had a TV in their bedroom was significantly higher than that of the adolescents who did not have a TV in their bedroom.

Answer 1

Part A

a)

Answer: (Why is this an observational study?)

The correct answer should be option A) 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

Explanation:

It' s an observational study because researchers measured the characteristics of a selected frame of individuals by studying individuals in a sample without attempting to manipulate nor influencing over the variables studied.

Answer: (What type of study is this?)

The correct answer would be option C) It is a Case-control study.

Explanation:

Throughout the medical community, case control studies are often performed in order to compare individuals with some particular characteristic with individuals who do not have that characteristic. This is usually done to an homogeneous group in which individuals only differ in the characteristic in question but for the rest of characteristics they are random pretty much the similar.

b)

Answer:

The correct answer would be option A) The response variable is the body mass index of the adolescents.

Explanation: A study is rehearsed upon the examinated variables.

c)

Answer:

The correct answer would be option B) Yes, for example, possible lurking variables might be eating habits and amount of exercise per week.

Explanation:

Depending on eating habits and exercise and how they combine with other factors like metabolism and how it could respond, there may be some variations.

d)

Answer:

The correct answer would be option A) It means that socioeconomic status is not an explanatory variable and that including this variable in the study does not change the result of the study.

Explanation:

Although there had been socioeconomic statuses introduced as variables throughout the study, the results stayed the same.

e)

Answer:

The correct answer would be option A) Yes, television in the bedroom causes obesity because 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.

Explanation:

The facts followed up by the variables in the research came up with conclusive results of higher body mass index on adolescents who have a television in their bedroom.

I hope it helps!