A health study reported that, in one country, systolic blood pressure readings have a mean of
117 and a standard deviation of 13.
If systolic blood pressure in that country has a normal distribution, what proportion of the population suffers from high blood pressure?
First you'll have to DEFINE what is accepted as HIGH BLOOD PRESSURE. (I'm a doctor....I know what is accepted here in USA .)
Well in the US SYSTOLIC BP above 140 is considered HYPERTENSIVE (and these numbers work out well for the question)
If you look at a bell curve standard distribution , 50 % are below the median
ONE standard deviation above the mean would be 140
If you go to :
http://nationalpainreport.com/living-well-bell-curve-8821914.html
you will see that ONE standard DEVIATION represents ANOTHER 34% of the total population that is NOT hypertensive
So 50 % + 34% of the population are NOT hypertensive (84%)
That means that everyone left IS hypertensive 100 - 84% = 16% are hypertensive
First you'll have to DEFINE what is accepted as HIGH BLOOD PRESSURE. (I'm a doctor....I know what is accepted here in USA .)
First you'll have to DEFINE what is accepted as HIGH BLOOD PRESSURE. (I'm a doctor....I know what is accepted here in USA .)
Well in the US SYSTOLIC BP above 140 is considered HYPERTENSIVE (and these numbers work out well for the question)
If you look at a bell curve standard distribution , 50 % are below the median
ONE standard deviation above the mean would be 140
If you go to :
http://nationalpainreport.com/living-well-bell-curve-8821914.html
you will see that ONE standard DEVIATION represents ANOTHER 34% of the total population that is NOT hypertensive
So 50 % + 34% of the population are NOT hypertensive (84%)
That means that everyone left IS hypertensive 100 - 84% = 16% are hypertensive
