This is the 15764th most frequent Russian word.
проведена
"Проведена" means "conducted" or "carried out."
Here, 'проведена' is the past participle of 'провести', describing that an action was performed (conducting) in a place (laboratory).
Экспертиза была проведена в лаборатории.
The examination was conducted in the laboratory.
In this case, 'проведена' emphasizes the completion and correct execution of an action (carrying out the data check).
Проверка данных проведена корректно.
The data check was carried out correctly.
In this example, 'проведена' indicates the fulfillment of the action (session holding) performed by someone (teacher) electronically.