Final answer:
The relative frequency can be calculated from a frequency table by dividing each frequency by the total number of data values in the set.
Step-by-step explanation:
The correct method to calculate relative frequency from a frequency table is to divide each frequency by the total number of data values. This gives you the proportion of each value in relation to the whole data set. For example, if you have a frequency table with 20 data values and one value has a frequency of 5, the relative frequency for that value would be 5/20 or 0.25.
The option A is correct: Use a frequency table and divide each frequency by the total.