A nurse measured the blood pressure of each patient who visited his clinic durin
ID: 3276769 • Letter: A
Question
A nurse measured the blood pressure of each patient who visited his clinic during the last month. At the right is a relative-frequency histogram for the systolic blood pressure readings for those between 25 and 40 years old. Use the histogram to answer the following questions.
a. What systolic blood pressure class had the highest number of people in its class? What was the percentage of patients in that class?
b. Approximately what percentage of the people measured had a systolic blood pressure reading lower than 140?
c. Accurately estimate the median of the pressure readings.
0.4 035 n03 0025 02 015 01 100 110 120 130 140 150 160 Pressure ReadingsExplanation / Answer
(a) The class had the highest number of people is 110 - 120
The percentage of patients in that class is 35 %
(b) The percentage of the people measured had a systolic blood pressure reading lower than 140 is
0.15 + 0.35 + 0.25 + 0.15 = 0.90
= 90 %
(c) The median of the pressure readings 120
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