Part 4 · Making Sense of Numbers
Same concept, other depth: Clinical Reasoning →
Dear Doctor, shall we discuss & understand?
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You measure Hb in the same 50 girls before and after a weekly iron‑folic acid programme. Are you comparing two separate groups? No, the same girls twice. So you need a paired test, not the ordinary one. Choosing the wrong test can give the wrong answer.
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Talk it through with Dr. Amy
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