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What is 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- and explain in detail?
Ref:Parks 23rd edition pg 849. 1SD : confidence limit = 68% 2SD : confidence limit = 95% 3SD : confidence limit = 99.7% 68% have BP : 110 - 130 95% have BP : 100 - 140 99.7% have BP : 90 - 150