This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Mean and Median
Prompt focus: For the data set 2, 5, 5, 9, 12, the median is:
Why the correct answer works
5
Middle value of an ordered list of 5 numbers is the third value: 5.
Why the tempting wrong answer fails
The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.
Plain-language takeaway
Sort: 2, 5, 5, 9, 12. With 5 values, the median is the middle value, which is 5.
Simple analogy
Think of mean and median like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.