Which of the following scenarios describes an observational study? (1 point) Responses 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.
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 an observational study, researchers observe subjects in their natural environment without manipulation or intervention, whereas the other scenarios involve assigning interventions or treatments to participants.
