A nurse measured the blood pressure of each person who visited her clinic. Follo

Question

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. The blood pressure readings were given to the nearest whole number. Approximately what percentage of the people aged 25-40 had a systolic blood pressure reading between 110 and 139 inclusive? 0.35 0.30 0.25 0.20 0.15 0.10 005 Relative Frequency 100 110 120 130 140 150 160 Systolic Blood Pressure (man H OA, 59% B. 75% °C, 39% OD, 89%

Explanation / Answer

reading beween 110-120 = 0.35

between 120-130 = 0.25

between 130 - 140 = 0.15

and to find reading between 110 - 139 inclusive = 0.35 + 0.25 + 0.15 = 0.75 = 75%

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