Researchers conducted a study on the effectiveness of a knee surgery to cure art

Question

Researchers conducted a study on the effectiveness of a knee surgery to cure arthritis. It was randomly determined whether people got the knee surgery. Everyone who underwent the surgery reported feeling less pain. Is this evidence that the surgery causes a decrease in pain? Select one: a. No, because there may be confounding variables such as prior illnesses and exercise habits. b. No, as the study does not have a control or comparison group. c. Yes, because everyone who underwent the surgery reported feeling less pain. d. Yes, because this is a randomised experiment where it was randomly determined whether people got the knee o surgery.

Explanation / Answer

No, because the study does not have a control or comparison group. So it can't be said with certainity that the surgery was the cause of the reduced pain.

Hope this helps !

Related Questions

Navigate

• Browse (All)
• Browse R
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.