Social & Preventive Medicine Systolic BP of a group of 200 people follows normal distribution. Mean BP is 120 mm Hg and standard detion 10. Which of the following is true- A 68% of people have BP between 110-130 mm Hg B 95% of people have BP between 110-130 mm Hg C 68% of people have BP between 100-140 mm Hg D 99% of people have BP between 100-140 mm Hg 💡 Explanation Systolic BP of a group of 200 people follows normal distribution. Mean BP is 120 mm Hg and standard detion 10. Which of the following is true- ✓ Correct Answer: A. 68% of people have BP between 110-130 mm Hg