Question 455354
Assume that blood pressure readings are normally distributed with u=120 and o=8 A blood pressure reading of 145 or more may require medical attention. What percentage of people have a blood pressure reading greater than 145?
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z(145) = (145-120)/8 = 25/8
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P(x > 145) = P(z > 27/8) = 0.0008891.. = 0.08891%
Cheers,
Stan H.