MATH 225N: Week 1 Evidence, Claims, and types Questions and Answers

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1. Question: A study is planned to research the effects of drinking coffee on hours of sleep. Would an experimental or observational study design be more appropriate? 2. Question: A researcher is in... terested in the effects of watching videos just before bed on the quality of sleep. Which of the following claims would be appropriate for this situation? Select only one answer choice. 3. Question: In a psychological study aimed at testing a medicine for reducing stress levels, the researcher grouped the participants into 2groups and gave the stress-reduction pill to one group and a placebo pill to another group. In the description of the above situation, determine the experimental group. 4. Question: In a survey conducted to find out the feedback of a sports program organized in a club, the organizers asked the respondents to classify their feedback as good, fair, poor, and bad. Is the study observational or experimental? If it is an experiment, what is the controlled factor? 5. Question: In a survey conducted to find out the feedback of a sports program organized in a club, the organizers asked the respondents to classify their feedback as good, fair, poor, and bad. Is the study observational or experimental? If it is an experiment, what is the controlled factor? 6. Question: A study was performed with a random sample of 513 bolts produced at one factory. What population would be appropriate for generalizing conclusions from the study, assuming the data collection methods used did not introduce biases? 7. Question: A researcher wants to find out the effect of the amount of protein eaten at breakfast on the aerobic performance of runners. Would an experimental or observational study design be more appropriate? [Show More]

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