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The word 'skewness' is correct and usable in written English.
You can use it to describe something that is not symmetrical or shows an imbalance in its distribution. For example, "The skewness in the data indicated that there was a disproportionate amount of money spent on marketing compared to product development."
Exact(4)
So while I could pass vocabulary quizzes — I understood "skewness" — I was left to guess when questions required computation.
I appreciated the hokey puns, and the bland voice saying that while it may sound like Stephen Colbert's "truthiness," skewness is in fact a useful mathematical concept.
I was interested to learn about the existence of the Pearson coefficient of skewness.
"The desired effect on market trends has not been achieved (no reduction of the negative skewness of returns is being observed) and there is no evidence of the possible impact of this measure on extreme market movements".
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com