Question

systolic blood pressure readings for a population of adults are normally distributed with a mean of 124 and a standard deviation of 15. (a reading above 140 is considered to be high blood pressure.) begin by converting the given blood pressure reading into a z - score. then use the accompanying table of z - scores and percentiles to find the percentage of people with blood pressure readings above 130. click the icon to view the table of z - scores and percentiles. the z - score is (type an integer or a decimal.)

Explanation:

Step1: Recall the z - score formula

The formula for the z - score is \(z=\frac{x-\mu}{\sigma}\), where \(x\) is the value from the data set, \(\mu\) is the mean, and \(\sigma\) is the standard deviation.

Step2: Substitute the given values into the formula

We are given that \(x = 130\), \(\mu=124\), and \(\sigma = 15\).

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Answer:

\(0.4\)