Social & Preventive Medicine A study generated a normal distribution with a mean value as 200 and standard deviation of 20. 68% of area will fall between A 180-220 B 160-240 C 190-210 D 150-250 💡 Explanation A study generated a normal distribution with a mean value as 200 and standard deviation of 20. 68% of area will fall between ✓ Correct Answer: A. 180-220