This is the 824th most frequent Polish word.
przeprowadzona
"Przeprowadzona" means "carried out" or "conducted."
The word "przeprowadzona" is used here as a past participle in a passive construction to indicate that the survey was carried out.
Ankieta została przeprowadzona wśród młodzieży.
The survey was conducted among the youth.
Here, "przeprowadzona" describes an action completed by a designated person, emphasizing its passive aspect.
Operacja była przeprowadzona przez doświadczonego chirurga.
The operation was conducted by an experienced surgeon.
In this sentence, "przeprowadzona" refers to an action (renovation) that has been completed and highlights the time frame of its completion.