Systolic BP of a group of 200 people follows normal distribution. Mean BP is 120 mm Hg and standard deviation 10. Which of the following is true -a) 68% of people have BP between 110-130 mmHgb) 95% of people have BP between 110-130 mm Hgc) 95% ofpeople have BP between 100-140 mm Hgd) 99% of pepole have BP between 100-140 mm Hg

The data provided in the question Mean =120 SD =10 1SD distribution 68% of people (136 out of 200) will have BP in range of 120 ± 10 (1SD) =110 —130 mm Hg. 32% of people (64 out of 200) will have BP outside 110-130 mm Hg. 16% of people (32 out of 200) will have BP above 130 mm Hg 16% of people (32 out of 200) will have BP below 110 mm Hg. 2 SD distribution 95% of people (190 out of 200) will have BP in the range of 120 ± 20 (2SD) = 100 —140 mm Hg 5% of people (10 out of 200) will have BP outside 100-140 mm Hg. 2.5% of people (5 out of 200) will have BP above 120 mm Hg 2.5% of people (5 out of 200) will have BP below 100 mm Hg 3SD distribution 99% of people (198 out of 200) will have BP in the range of 120 ± 30 (3SD) = 90 —150 mm Hg 1% of people (2 out of 200) will have BP outside 90 —150 mm Hg. 0.5% of people (1 out of 100) will have BP above 150 mm Hg 0.5% of people (1 out of 100) will have BP below 90 mm Hg