Refer to the following distribution of ages: For this distribution of ages,what is the relative class frequency for the lowest class?
A)0.50
B)0.18
C)0.20
D)0.10

Question

Refer to the following distribution of ages:  For this distribution of ages,what is the relative class frequency for the lowest class?
A)0.50 
B)0.18 
C)0.20 
D)0.10

Quizplus · Accepted Answer

We cannot determine the exact class intervals from the given information. However, since we are asked for the relative class frequency of the lowest class, we can assume that it is the class with the lowest ages, and we can estimate its frequency as the midpoint between 0 and the frequency of the next class (since we don't know the exact class intervals, we can assume they are equal).

From the given distribution, the next class has a frequency of 5, and there are 20 total ages. Therefore, we can estimate the frequency of the lowest class as (0 + 5)/2 = 2.5.

The relative frequency of a class is its frequency divided by the total frequency. For the given distribution, the total frequency is 20. Therefore, the relative frequency of the lowest class is 2.5/20 = 0.125, which is closest to 0.20 (answer choice C).

Refer to the Following Distribution of Ages: for This