Select the correct choice that completes the sentence below. For a numerical variable the sum of the relative frequencies of all the classes is equal to square

The correct choice is:<br /><br />**1. 1**<br /><br />### Explanation:<br />For a numerical variable, the relative frequency of each class represents the proportion of the total data that falls into that class. When you sum up the relative frequencies of all the classes, it must equal 1 (or 100%) because the relative frequencies collectively account for the entire dataset.