Grabbing the mean when the SAT asked for the median
The list is right there, the word 'median' is right there — and you still computed the mean, because computing feels like progress.
Why it happens
Mean has a formula; median has a procedure (sort, then pick). Brains prefer formulas under time pressure, so the formula fires first.
See the trap
Find the median of 3, 9, 4, 4, 10.
(3 + 9 + 4 + 4 + 10)/5 = 6.
Sort: 3, 4, 4, 9, 10 → middle value = 4.
How to actually fix it
- 1Circle the statistic word in the question before touching numbers.
- 2Median means SORT FIRST — no sorting, no median.
- 3For even counts, average the middle two.
Practice this trap · 5 real questions
Each of these is a question from the free bank that turns on the mistake above — the trap is the reason its wrong answer looks right. Easiest first.
FAQ
When do mean and median differ most?
With outliers. One huge value drags the mean but leaves the median alone — which is exactly what the SAT loves to test.
How do I stop repeating this mistake?
Reading the explanation isn't enough — your brain needs to beat the trap on a fresh question. Practice the skill in the kaoshen.co question bank: miss one and it is logged with the exact error, then brought back to you three days later and again after fourteen.
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