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20emmanuelg1030
06.05.2020 •
Mathematics
For adults in the town of Bridgeport, systolic blood pressure is normally distributed with a mean of 134 mmHg and a standard deviation of 9 mmHg. What percentage of adults in the town have a systolic blood pressure less than 125 mmHg?
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Ответ:
The percentage of adults that have a blodd pressure less than 125 mmHg is 15.87%
Step-by-step explanation:
In a normal distribution, we have that in the range:
(-∞, M) we have a 50%
(M, ∞) we have the other 50%.
(the infinite symbols are for notation, obviusly you can not have negative blood pressure)
where M is the mean.
If SD is the standard deviation, in the range
(M - SD, M) we have a 34.13%
Now, the values we have are: M = 134 mmHg, SD = 9mmHg
Then we can replace those values and get:
(M - SD, M) = (125mmHg, 134mmHg) = 34.13%
The range of blodd presure that is smaller than
Then, the range of blood pressure smaller than 125mmHg is the range between (-∞, 125mmHg)
We can calculate this proportion as:
(-∞. 134mmHg) - ( 125mmHg, 134mmHg) = 50% - 34.13% = 15.87%
The percentage of adults that have a blodd pressure less than 125 mmHg is 15.87%
Ответ:
The number of people who died in the attacks