QUESTION 1 A recent study wanted to determine if cigarette smokers had higher bl

Question

QUESTION 1 A recent study wanted to determine if cigarette smokers had higher blood pressure levels than non-smokers. Which of the following is true? OA This is an observational study. Causation between smoking and high blood pressure may be inferred if the study shows a strong association. OB. This is random comparative experiment Causation betyeen smoking and high blood pressure should not be inferred because there may be lurking variables. lurking variables. strong association. ° C. This is an observational study. Causation between smoking and high blood pressure should not be inferred because there may be O D. This is random comparative experiment. Causation between smoking and high blood pressure may be inferred if the study shows a

Explanation / Answer

Q1

It is a random comparative experiment as a sample will be chosen at random (not observed) and then classified based on their smoking habits and BP level. Also, there's no chance of having a lurking variable and causation can be inferred if there is an association. Therefore, we may choose Option D.

Q2

This is obviously an experiment.

So we choose option A.

The group receiving pills with inert ingredients will definitely experience placebo effect.

So we do not choose Option B.

Options C holds true.

Now, if the researcher who evaluates the patients was aware of the treatment, there is a possibility of bias from his part. Therefore, we do not choose Option D.

Q3

Since there are 3 levels for diet and 4 levels of exercise, total number of combinations that should be studied is 3×4=12

We choose Option E.

Q4

The wordings of the question are leading the people to choose in favour of their family without being rational about the issue addressed in the question.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.