Board Certified Behavior Analyst (BCBA) Practice Test

To report the percentage of occurrence after Tony collects data on waste bins emptied, what must he also know?

1. How many bins were checked

2. How many bins contained trash

3. Times the bins were emptied

4. Amount of trash collected

The correct answer is: How many bins contained trash

To accurately report the percentage of occurrence regarding the waste bins that were emptied, it's essential to know how many bins contained trash. The percentage is determined by comparing the number of filled bins that were actually emptied to the total number of bins considered for this measurement. If Tony knows how many bins contained trash, he can establish that numerator for his percentage calculation. In this context, the denominator can be represented by the total number of bins that were checked or observed. Understanding how many bins were checked is indeed important, but without knowing how many of those contained trash, Tony cannot accurately reflect the effectiveness or the success rate of the emptying process. Thus, the correct understanding of what constitutes the occurrence percentage requires knowledge of the numerator (how many contained trash) for the calculation, making it integral to accurately convey the data.