Question

From information on a previous question: The mean systolic blood pressure for a population of patients (µ) from a local clinic is 130 with a standard deviation (σ) of 18.

What is the probability that a patient chosen at random will have a systolic blood pressure between 93 and 126? Rounded to the nearest ten thousandth (4 places to the right of the decimal).

  

Answer 1

Assuming that the systolic blood pressure are normally distributed, we can write

Let X denotes the systolic blood pressure for a randomly selected person.

X ~ Normal(130, 18²)

Now,

The probability that a patient chosen at random will have a systolic blood pressure between 93 and 126