Choose whether an experiment or an observational study would be more appropriate to investigate the following....
Choose whether an experiment or an observational study would be more appropriate to investigate the following.
1. Whether or not smoking has an effect on coronary heart disease.
a) Observational study because smoking or not smoking are treatments that can be imposed on subjects.
b) Observational study because smoking is not a treatment that can be ethically imposed on subjects.
c) Experiment because smoking is not a treatment that can be ethically imposed on subjects.
d) Experiment because smoking or not smoking are treatments that be imposed on subjects.
2) Whether or not endorsement from a medalist makes someone more likely to purchase a box of cereal.
a) Observational study because subjects stores can be assigned to receive either boxes with the endorsement packaging or without the endorsement packaging.
b) Observational study because stores cannot be assigned to receive either boxes with the endorsement packaging or without the endorsement packaging
c) Experiment because stores cannot be assigned to receive either boxes with the endorsement packaging or without the endorsement packaging.
d) Experiment because stores can be assigned to receive either boxes with the endorsement packaging or without the endorsement packaging.
Homework Answers
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Choose whether an experiment or an observational study
would be more appropriate to investigate the
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For each of the following scenarios, (1) identify whether it’s
observational study or experiment, and (2) identify explanatory
variable and response variable.
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You may have to zoom in on a few questions, but I posted the
pictures below-
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Font Paragraph low would you use a completely randomized experiment in each of the following settings? Is a placebo being used or not? Be specific and give details. (c) A skin patch contains a new drug to help people quit smoking. A group of 75 cigarette smokers have volunteered as subjects to test the new skin patch. For one month, 40 of t volunteers receive skin patches with the new drug. The other volunteers receive skin patches with no drugs....
For each of the following scenarios, (1) identify whether it’s
observational study or experiment, and (2) identify explanatory
variable and response variable.
For each of the following scenarios, (1) identify whether it's observational study or experiment, and (2) identify explanatory variable and response variable. Studies conducted in New York City and Boston have noticed that more heart attacks occur in December and January than in all other months. Some people have tried to conclude that overindulgence causes the increased risk...
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After randomly assigning subjects to treatments in a randomized comparative experiment, we can compare the treatment groups to see how well the randomization worked. We hope to find no significant differences among the groups. A study of how to provide premature infants with a substance essential to their development assigned infants at random to receive one of four types of supplement, called PBM, NLCP, PL-LCP, and TG- LCP. We are interested in whether the randomization results in equal proportions of...
You may have to zoom in on a few questions, but I posted the
pictures below-
Quit Smoking: The New England Journal of Medicine published the results of a double-blind, placebo-controlled experiment to study the effect of nicotine patches and the anti-depressant bupropion on quitting smoking. The target for quitting smoking was the 8th day of the experiment. In this experiment researchers randomly assigned smokers to treatments. or the 244 smokers taking the anti-depressant bupropion, 74 stopped smoking by the...
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