单选题 How is the relative frequency of an interval computed? A. Subtracting the lower limit of the interval by the upper limit. B. Dividing the frequency of that interval by the sum of all frequencies. C. Multiplying the frequency of the interval by 100.

【正确答案】 B

【答案解析】The relative frequency is the percentage of total observations falling within each interval. It is found by taking the frequency of the interval and dividing that number by the sum of all frequencies.