The phrase "already collected data" is correct and usable in written English.
You can use it when referring to data that has been gathered prior to the current point in time.
Example: "In our analysis, we will focus on the already collected data to draw meaningful conclusions."
Alternatives: "previously gathered data" or "data that has been collected".
The study only made secondary use of already collected data.
But the workers testified that the Port Authority already collected data on how many cars traveled in each lane, so such a traffic study would have been unnecessary.
At the same time, however, already collected data will not need to be destroyed, and it stays open to interpretation whether providers may or may not disclose these past data to state authorities upon request.
The difference with Stantt is it uses already collected data to predict potential body types.
It has already collected data from its vehicles for autonomous driving of over 1Bn miles, according to Teslanomics.co.co
We conclude that in some circumstances, already collected data sets can be combined for gene-environment and gene-development analyses.
New York already collects data on AIDS cases by name, with no breaches of confidentiality in almost two decades.
Many institutions already collect data on students' use of virtual learning environments, attendance, library use, assignment submission and grades, and many are also beginning to incorporate information on students' ethnic and social backgrounds.
Most Web sites, including AOL, already collect data about users to send them specific ads — but AOL is choosing to become more open about the practice and will run advertisements about it in coming months.
The company already collects data to use in future sales campaigns, but parts of MyMagic+ will allow Disney for the first time to track guest behavior in minute detail.
