To examine the effectiveness of a diet drink on reducing weight, a sample of respondents is taken at random. These respondents are divided randomly into two groups with equal number of members - Group A for whom the diet is administered and Group B for whom it is not administered. Members of both groups are weighed on a weekly basis for a period of three months The weights of members of both the groups are recorded. Discuss the purpose of the experiment. What purpose does each group serve? Identify test units, control group and treatment in the experiment Diagram the experiment. d) Highlight the demerits of this design. Suggest an alternative design if necessary.
Answers
Answer:
These respondents are divided randomly into two groups with equal number of members - Group A for whom the diet is administered and Group B for whom it is not administered. Members of both groups are weighed on a weekly basis for a period of three months The weights of members of both the groups are recorded.
Answer :
The experiment aims to evaluate the effectiveness of a diet drink in reducing weight. It follows a randomized controlled design, with Group A as the treatment group and Group B as the control group. Test units are individual respondents, and an alternative design could be a randomized double-blind placebo-controlled trial. Limitations of the current design include potential biases and the inability to account for individual differences.
Explanation :
The purpose of the experiment is to evaluate the effectiveness of the diet drink on reducing weight. The experiment follows a randomized controlled design, where a sample of respondents is randomly assigned to either Group A (treatment group) or Group B (control group).
The purpose of Group A is to receive the diet drink, which is the treatment being tested, while the purpose of Group B is to serve as a comparison group that does not receive the treatment. By comparing the weight changes between the two groups over the three-month period, the effectiveness of the diet drink can be determined.
The test units in this experiment are the individual respondents who are randomly assigned to either Group A or Group B. The control group is Group B, which does not receive the treatment (diet drink), while the treatment group is Group A, which receives the diet drink.
The diagram of the experiment can be represented as follows:
Random sample of respondents -> Random assignment to Group A (treatment) or Group B (control) -> Weighing of both groups on a weekly basis for three months -> Comparison of weight changes between Group A and Group B
One of the demerits of this design is that it may not account for individual differences in response to the diet drink. It is also possible that members of Group A may change their behavior in other ways that could impact their weight loss, which may not be directly attributed to the diet drink.
An alternative design could be a randomized double-blind placebo-controlled trial, where both Group A and Group B receive a similar-looking placebo drink, with only Group A receiving the actual diet drink. This design would help to control for potential biases and account for individual differences in response to the treatment.
In conclusion, the randomized controlled design with a treatment group and a control group is a useful approach to evaluate the effectiveness of the diet drink on reducing weight. However, an alternative design such as a randomized double-blind placebo-controlled trial may provide additional benefits and control for potential biases. The choice of design depends on the specific research question, resources, and ethical considerations.
To know more about the concept please go through the links :
https://brainly.in/question/33914905
https://brainly.in/question/5475016
#SPJ3