Final answer:
The correct method to compute relative class frequency is to divide the class frequency by the total number of observations, which corresponds to option B.
Step-by-step explanation:
To compute the relative class frequency (fn) in the context of statistics, you should opt for the choice that correctly describes the process. The correct method is to divide the class frequency by the total number of observations. This is accurately reflected in option B. Here's how you can do it step-by-step:
Determine the class frequency of the group you are interested in. For example, if 5 out of 20 students received an A grade on a test, then the class frequency for the A grade is 5.
Divide this class frequency by the total number of observations in the data set. Continuing the example, you would divide 5 (the number of A grades) by 20 (the total number of students), giving you a relative class frequency of 0.25 or 25%.
This calculation gives you the proportion of the data that falls within a specific class relative to the whole dataset.