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Determine whether the study is experiment or an observational study, and then identify a major problem with the study. a) The Physicians Health Study involved 22,071 male physicians. Based on random selections, 11,037 of them were treated with aspirin and the other 11,034 were given placebos. The study was stopped early because it became clear that the aspirin reduced the risk of hear attack by a substantial amount. b) A medical researcher tested for a difference in systolic blood pressure levels between male and female students who are 12 years of age. She randomly selected four males and four females for her study.
Determine whether the study is experiment or an observational study, and then identify a major problem with the study. a) The Physicians Health Study involved 22,071 male physicians. Based on random selections, 11,037 of them were treated with aspirin and the other 11,034 were given placebos. The study was stopped early because it became clear that the aspirin reduced the risk of hear attack by a substantial amount. b) A medical researcher tested for a difference in systolic blood pressure levels between male and female students who are 12 years of age. She randomly selected four males and four females for her study.
a) The study is anexperimental study.A major problem with the study is the lack of blinding.b) The study is an observational study.A major problem with the study is the small sample size.a) The PhysiciansHealthStudyis an experiment because the researchers intentionally assigned participants to two groups: one receiving aspirin and the other receiving placebos.A major problem with the study is the lack of blinding. Since the participants were aware of whether they were receivingaspirinor placebos, their knowledge could have influenced their behavior and responses, potentially introducing bias. Additionally, the study involved only male physicians, so the results may not be generalizable to other populations or genders.b) The study described is anobservational studybecause the researcher did not intervene or assign treatments. Instead, the researcher observed and compared existing differences in systolic blood pressure levels between male and female students.A major problem with the study is the smallsample size. With only four males and four females, the sample may not be representative of the larger population, limiting the generalizability of the findings. Additionally, the study did not specify any control or comparison group, making it challenging to draw definitive conclusions about the differences in blood pressure between genders.Learn more aboutexperimental studybrainly.com/question/3233616#SPJ11...