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Systolic blood pressure readings for a population of adults are normally distributed
with a mean of 123 and a standard deviation of 12. (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 below
159,
Click the icon to view the table of z-scores and percentiles.
The z-score is
(Type an integer or a decimal)
The percentage of people with blood pressure readings below 159 is
(Round to two decimal places as needed.)
%