keskimääräisistä

Keskimääräisistä is the elative plural form of the Finnish adjective keskimääräinen, meaning average or typical. It is used with a plural noun in the elative case to express origin, source, or basis, roughly translating to “from the averages” or “of the averages.”

In Finnish adjective declension, keskimääräinen has several inflected forms. The stem is keskimääräis-, and the endings reflect the grammatical case and number. Examples include keskimääräiset (nominative plural, “the averages”), keskimääräisten (genitive plural, “of the averages”), keskimääräisiä (partitive plural, “some averages”), keskimääräisissä (inessive plural, “in the averages”), and keskimääräisistä (elative plural, “from the averages”). Translative form would be keskimääräisiksi, used for “as the averages” or “to become the averages,” among other contexts.

Usage-wise, keskimääräisistä occurs primarily in statistical or analytical writing, where one discusses data sets, values, or distributions derived from averages. It typically accompanies a plural noun in the elative case, as in: Keskimääräisistä arvoista voidaan päätellä trendi (From the average values, a trend can be inferred). Another example is Keskimääräisistä arvoista laadittu raportti, meaning a report based on the average values. The term is standard Finnish and should not be confused with singular forms like keskimääräinen or with other case forms of the adjective.

See also: keskivertoinen, keskiarvo, tilastotieteen termistö.