The phrase "a study was done" is correct and usable in written English.
It can be used when referring to research or analysis that has been conducted on a particular topic.
Example: "A study was done to investigate the effects of sleep on cognitive performance."
Alternatives: "a study was conducted" or "research was carried out".
The policy changed after a study was done of student skateboarders at Ohio State University that showed most had above average grades".
If such a study was done today, orchestras might descend yet further; one ensemble after another has lately fallen prey to financial turmoil and labor-management disputes.
After fires in Croatia had damaged many forests, a study was done to see if restoration was worthwhile given their value to the tourist industry.
Courts suspended much of the plan for four years until last August while a study was done to assess the impact on traffic.
A study was done using 12 moulaged patients who were carried down 4 flights of stairs.
A study was done in Saudi Arabia and revealed poor sexual health knowledge in the majority of adolescent participants.
In addition, Dr. Henschke said, CT technology is advancing so rapidly that scanners can become obsolete even before a study is done.
According to a study being done by the Lincoln Institute of Land Policy in Cambridge, Mass., at least 60 such projects are under way at urban universities around the country.
MicroSort is still experimental and available only as part of a study being done to apply for approval from the Food and Drug Administration.
How the corporation compensates investors and whether it does so fairly is the subject of a study being done by the General Accounting Office that was requested by Representative John Dingell, Democrat of Michigan.
In another ultrasound method to verify endotracheal tube placement, a study is done in California, USA.
