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A-2 [1] (12 marks) Circle the best answer. Use the following Histogram to answer parts (i) and (iii) 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. (i) Approximately what percentage of the people aged 25-40 had a systolic blood pressure reading less than 120? A) 15% B) 75% C) 50% D) 35% E) 25% (ii) Given that 200 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading less than 130? A) 70 B) 25 C) 100 D) 50 E) 150 (iii) Which of the following is true for systolic Blood Pressure A) Mean and Median are same because the histogram is symmetric B) Mean is greater than median because histogram is left-skewed C) Mean is greater than median because histogram is right-skewed D) Median is greater than mean because histogram is left-skewed E) Median is greater than mean because histogram is right-skewed
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