The phrase "a certain margin of" is correct and usable in written English.
It can be used when discussing a degree of flexibility, tolerance, or allowance in a particular context, such as measurements, expectations, or outcomes.
Example: "In our calculations, we need to account for a certain margin of error to ensure accuracy."
Alternatives: "a specific range of" or "a degree of".
However, we accounted for this source of inaccuracy by allowing for a certain margin of error.
When you hear poll results reported with a certain margin of error, that's only part of the story.
The results tend to represent the wider electorate voting at the caucus sites, within a certain margin of sampling error.
Similarly, no democratic system, with its vulnerability to human error and mischief, can be calibrated to function precisely within a certain margin of error.
However, if a certain margin of error is taken, the possible functioning of the method would be probable in spite of some discrepancies.
Results show on the one hand a significant increase in efficiency for a certain margin of applied electric field, and on the another hand the instabilities of efficiency.
Surgeons say some radiation and medical oncologists insist on a certain margin size before starting the rest of the patient's treatment.
The CBO report cuts the legs out from the GOP's attack on "risk corridors," a provision of the ACA that balances costs and expenses for insurance companies participating in the act by paying insurers whose coverage expenses exceed expectations by a certain margin in the first few years of the act, and collecting excess revenues from those whose expenses come in unexpectedly lower. .
In the future, one alternative (however politically unpalatable) would be to call a draw in any state in which the popular vote finishes within a certain margin -- say, less than one-tenth of 1percentt -- and to split the electoral votes.
