Determine whether the study depicts an observational study or a designed experiment. A survey is conducted asking 400 people, 'Do you prefer Coke or Pepsi?'. While shopping, 200 pe... Determine whether the study depicts an observational study or a designed experiment. A survey is conducted asking 400 people, 'Do you prefer Coke or Pepsi?'. While shopping, 200 people are asked to perform a taste test in which they drink from two randomly placed, unmarked cups. They are then asked which drink they prefer. Sixty patients with carpal tunnel syndrome are randomly divided into two groups. One group is treated weekly with both acupuncture and an exercise regimen. The other is treated weekly with the same exercise regimen, but no acupuncture. After 1 year, both groups are questioned about their level of pain due to carpal tunnel syndrome. Conservation agents netted 250 large-mouth bass in a lake and determined how many were carrying parasites.
Understand the Problem
The question is asking to determine whether various studies represent observational studies or designed experiments based on the information provided for each scenario.
Answer
Observational, Experiment, Experiment, Observational
The answers are:
- Observational
- Experiment
- Experiment
- Observational
Answer for screen readers
The answers are:
- Observational
- Experiment
- Experiment
- Observational
More Information
Observational studies involve collecting data without interference, while experiments involve intervention or manipulation to determine effects.
Tips
Avoid confusion by focusing on whether there’s any manipulation or random assignment.
Sources
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