Social & Preventive Medicine Estimated mean Hemoglobin (Hb) of 100 women is 10 g%. Standard deviation (σ) is 1gm %. Standard error of estimate will be – A 0.001 B 1 C 10 D 0.1 💡 Explanation Estimated mean Hemoglobin (Hb) of 100 women is 10 g%. Standard deviation (σ) is 1gm %. Standard error of estimate will be – ✓ Correct Answer: D. 0.1