Common mistake
Treating the mean as always the misleading one
It sounds like this
“The median is the honest figure. Anyone who quotes the mean is trying to fool you.”
Why it’s wrong
For a total — a budget, a tax take, the cost per head — the mean is exactly the right number, and the median would give the wrong answer.
The lesson that fixes it
Cognosc spots mistakes like this.
When you explain something in your own words, Cognosc can tell exactly which mistake you’re making — not just that you’re wrong — and gives you a short lesson to fix that one thing.