Twelve cases fall in the interval 40-49, and the relative frequency for that interval is .20. What is the total number of cases for the entire distribution?
A) 60
B) 48
C) 72
D) 20

Question

Quizplus · Accepted Answer

The relative frequency is calculated as the number of cases in the interval divided by the total number of cases. Given that the relative frequency is 0.20 and there are 12 cases in the interval, the total number of cases is 12 / 0.20 = 60.

Twelve Cases Fall in the Interval 40-49, and the Relative