Common mistake
Using the mean to answer 'what is normal here'
It sounds like this
“If I want to know what a normal nurse earns, I'll look up the average nurse's salary.”
Why it’s wrong
With a long tail of high earners the mean sits above most people, so it overstates what is normal.
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.