Social & Preventive Medicine In a normal curve, the area of one standard deviation around the mean includes which of the following percent of values in a distribution- A 48.60% B 68.30% C 95.40% D 99.70% 💡 Explanation In a normal curve, the area of one standard deviation around the mean includes which of the following percent of values in a distribution- ✓ Correct Answer: B. 68.30%