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A researcher assigns participants to two groups to test the effects of a new medication on blood pressure.
A researcher assigns participants to two groups to test the effects of a new medication on blood pressure.
A researcher randomly selects students from a university to observe their study habits without intervening.
A researcher randomly selects students from a university to observe their study habits without intervening.
A researcher asks participants to follow a specific diet and monitors their weight loss.
A researcher asks participants to follow a specific diet and monitors their weight loss.
A researcher applies a treatment to soil samples to study the effect of fertilizer on plant growth.
A researcher applies a treatment to soil samples to study the effect of fertilizer on plant growth.
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1 answer
The scenario that describes an observational study is:
A researcher randomly selects students from a university to observe their study habits without intervening.
In this scenario, the researcher is observing and collecting data on students' study habits without manipulating any variables, which is characteristic of observational studies. The other scenarios involve some form of intervention or treatment, which are characteristic of experimental studies.
