BACB BCABA Exam - Topic 2 Question 120 Discussion

Actual exam question for BACB's BCABA exam

Question #: 120
Topic #: 2

Tony is supervising a work crew at the post office. Every day, his clients are supposed to check each waste bin and empty those that contain trash. Tony takes data on the number of waste bins emptied by the crew. In order to report data in terms of percentage of occurrence Tony MUST also know:

Athat some waste bins contained trash.

Bhow many waste bins contained trash.

Chow many waste bins were in the office.

DThis behavior is not amenable to percent of occurrence reporting.

Show Suggested Answer

Suggested Answer: B

by Reed at Jan 05, 2026, 05:16 AM

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Haydee

1 day ago

Wait, does he really need to know if bins had trash?

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Peter

6 days ago

Definitely B, can't report without that info!

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Iluminada

11 days ago

He needs to know how many bins were there.

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Annita

17 days ago

Wait, so Tony can't even report the percentage of bins that were empty? That seems like a pretty basic metric.

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Dierdre

22 days ago

Haha, I bet Tony wishes he had a magical trash-sensing superpower to know which bins were full without actually checking them!

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Jacquelyne

27 days ago

D) What? Reporting the percentage of occurrence is not possible with this data? That's just silly.

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Terrilyn

2 months ago

A) and B) are both necessary to determine the percentage of waste bins that contained trash.

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Terrilyn

2 months ago

C) Knowing the total number of waste bins is crucial for the percentage calculation.

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Janessa

2 months ago

B) Definitely, you need to know how many waste bins contained trash to calculate the percentage.

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Jonell

2 months ago

I lean towards A, but I’m not confident. It seems like knowing if there’s trash at all is necessary, but I wonder if it’s enough on its own.

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Yong

2 months ago

I remember a practice question where we had to determine what data was needed for percentage calculations. I think it was similar to this, but I can't recall the exact details.

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Rikki

2 months ago

I'm not entirely sure, but I feel like B could be important too, because if we don't know how many had trash, we can't really report accurately.

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Noel

3 months ago

I think the answer might be C, since knowing the total number of waste bins is crucial for calculating percentages.

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Thea

3 months ago

This looks straightforward enough. I'd start by identifying the key information we need, which is the total number of waste bins and the number that contained trash. Then I'd use that to calculate the percentage, following the instructions in the question.

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Allene

3 months ago

I'm a little confused by the wording of this question. It seems like option D might be the correct answer, but I'm not totally sure. I'd probably try to break down the question and think through each of the answer choices carefully.

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Odelia

3 months ago

Okay, so we need to know the total number of waste bins and how many had trash in order to calculate the percentage. That makes sense. I think I'd start by trying to find those numbers, and then use them to solve for the percentage.

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Dion

3 months ago

Hmm, this seems a bit tricky. I'm not sure if I fully understand what "percent of occurrence" means in this context. I'd probably try to clarify that with the instructor before attempting to solve the problem.

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Yuonne

4 months ago

I think I'd start by looking at the information given in the question. It seems like we need to know the total number of waste bins and how many of them contained trash in order to calculate the percentage. I'd focus on finding those two key pieces of data.

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