Question
A study claims that the combination of vitamin C with vitamin E is more effective for preventing the flu than vitamin C alone. In the study, a group of
researchers studied 1132 subjects. The subjects were randomly assigned to one of three study groups. The first group of 310 subjects were instructed to
take 600 mg daily of vitamin C. The second group of 418 subjects were instructed to take 600 mg of vitamin C and 200 IU of vitamin E daily. The third
group of 404 subjects were instructed to take 600 mg of vitamin C and 400 IU of vitamin E daily. The incidence of flu over a season was recorded. All
subjects knew which treatment they were receiving.
In this study, which is the control group?
A The second group of 418 taking 200 IU of vitamin E
B The first group of 310 taking vitamin C alone
C The third group of 404 taking 400 IU of vitamin E
D The 1132 subjects
E There is no control group.
This study is
A not blind
B not an experiment
C double-blind
D blind, but not double-blind
E none of the above
researchers studied 1132 subjects. The subjects were randomly assigned to one of three study groups. The first group of 310 subjects were instructed to
take 600 mg daily of vitamin C. The second group of 418 subjects were instructed to take 600 mg of vitamin C and 200 IU of vitamin E daily. The third
group of 404 subjects were instructed to take 600 mg of vitamin C and 400 IU of vitamin E daily. The incidence of flu over a season was recorded. All
subjects knew which treatment they were receiving.
In this study, which is the control group?
A The second group of 418 taking 200 IU of vitamin E
B The first group of 310 taking vitamin C alone
C The third group of 404 taking 400 IU of vitamin E
D The 1132 subjects
E There is no control group.
This study is
A not blind
B not an experiment
C double-blind
D blind, but not double-blind
E none of the above
Ask by Valdez Ortiz. in the United States
Jan 16,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
- Control group: B. The first group of 310 taking vitamin C alone
- Study is: A. not blind
Solution
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Bonus Knowledge
In this study, the control group is the second group of 418 subjects who were instructed to take 600 mg of vitamin C and 200 IU of vitamin E daily. This group serves as a basis for comparison against the other treatment groups to evaluate the effectiveness of the additional Vitamin E.
This study is not blind. All subjects were aware of which treatment they were receiving, introducing a potential bias in their self-reporting or behavior. A blind study keeps participants unaware of their group allocation, which helps improve the reliability of the results.
