Where does “virhemarginaali” come from?

virhemarginaali (Finnish) comes from Finnish marginaali, from Swedish marginal — a margin.

virhemarginaali (Finnish): margin of error

Definitions

Step	Language	Word	Meaning
1	Finnish	marginaali	margin
2	Swedish	marginal	a margin

virhemarginaali — Etymology, Origin & Word History | Etymology Explorer