Question 4 (1 point) Listen An appropriate experimental design does NOT include Control of Extraneous variables A representative sample A small, similar group of individuals that receive reward for participation Random assignment
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The question asks what an appropriate experimental design does NOT include. This means we need to identify the option that is *not* a characteristic of a good experimental design. Show more…
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Which of the following is a necessary component for an experiment to potentially yield a cause-and-effect conclusion? Random assignment of subjects to treatment groups. None of these. Any experiment can potentially yield a cause-effect conclusion Must be an Observational Study Subjects are recruited by way of a simple random sample.
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In the experiment of the previous exercise, the subjects were randomly assigned to the different treatments. What is the most important reason for this random assignment? (a) Random assignment eliminates the effects of other variables such as stress and body weight. (b) Random assignment is a good way to create groups of subjects that are roughly equivalent at the beginning of the experiment. (c) Random assignment makes it possible to make a conclusion about all men. (d) Random assignment reduces the amount of variation in blood pressure. (e) Random assignment prevents the placebo effect from ruining the results of the study.
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Which of the following is an important advantage of experiments over observational studies? Check all that apply. A. Ensuring that each subject in the trial receives the best possible treatment B. Isolating the effects of a specific treatment C. Guaranteeing that approximately the same number of subjects is assigned to each treatment group D. Controlling for lurking variables to have a stronger case for causation
Md.Daniyal A.
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