5. For quantitative data, the relative frequency for a class is computed as

A) Class width divided by class interval.

B) Class midpoint divided by the class frequency.

C) Class frequency divided by the class interval.

D) Class frequency divided by the total frequency.

6. The monthly salaries of a sample of 100 employees were rounded to the nearest ten dollars. They

ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes,

what is the most convenient class interval?

A)$ 50B) $100C) $150D) $200E) None of the above

7. A group of students were surveyed about their interest in a new International Studies program.

Interest was measured in terms of high, medium, or low. 30 students responded high interest, 50

students responded medium interest and 20 students responded low interest. What is the relative

frequency of students with high interest?

A)30% B) 50%C) 40% D) cannot be determined.