Question 1
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. Use the histogram to answer the question. 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 less than 120?
◦ 3.5%
◦ 5%
◦ 35%
◦ 50%
Question 2
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. Use the histogram to answer the question. The blood pressure readings were given to the nearest whole number.
Given that 800 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading between 140 and 149 inclusive?
◦ 64
◦ 8
◦ 6
◦ 640
Circulatory System: Blood Vessels
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