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A researcher wants to compare the effectiveness of two pain medications, A and B. She has two design options:
Design 1 (Matched Pairs): Recruit 30 patients with chronic pain. Each patient receives both medications (in random order, separated by a washout period) and rates pain relief on a 0–10 scale.
Design 2 (Independent Samples): Randomly assign 60 patients into two groups of 30. Group 1 receives medication A; Group 2 receives medication B. Both groups rate pain relief.
Which statement best compares these designs?
A researcher wants to compare the effectiveness of two pain medications, A and B. She has two design options:
Design 1 (Matched Pairs): Recruit 30 patients with chronic pain. Each patient receives both medications (in random order, separated by a washout period) and rates pain relief on a 0–10 scale.
Design 2 (Independent Samples): Randomly assign 60 patients into two groups of 30. Group 1 receives medication A; Group 2 receives medication B. Both groups rate pain relief.
Which statement best compares these designs?