A study reports mean serum albumin of 3.8 g/dL with a standard deviation of 0.5 g/dL in a sample of 25 subjects. What is the standard error of the mean?
- A 1.00
- B 0.50
- C 0.10 ✓
- D 0.02
Correct answer: C. 0.10
Explanation
Standard error of the mean equals standard deviation divided by the square root of sample size. Here SE = 0.5 divided by root 25 = 0.5 divided by 5 = 0.10. Option D confuses SE with SD divided by n rather than root n. Option B is the SD itself, not the SE. Option A is a miscalculation.
Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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