"Confidence level" refers to how sure or certain you are about something. It is a measure of how confident you feel in the accuracy, reliability, or success of an outcome or prediction. Full definition
When you have multiple sources who are known to be accurate from empirical evidence (past accuracy), you get a pretty high confidence level of what will be. (macrumors.com)
Talk to the analysts at the service you use, and ask for confidence levels in mission critical data. (onlinepersonalswatch.com)
A short, local supply chain produces higher confidence levels in a quarter of people and people also had the most trust in the British supply chain. (foodnavigator.com)