In this subtitle the following words have the meanings indicated. “Claim” has the meaning stated in § 2–501 of this title. “Extrapolation” means the process of estimating an unknown value by projecting, with a calculated precision or margin of error, the results of the review of a sample to the universe from which the sample was drawn using a statistically valid sampling methodology. “Federal government” means an agency of the United States government or a contractor retained by the agency of the United States government. “Overpayment” means a payment that: Is made by the Department to a provider for services or goods for which the provider submitted a claim to the Department; Is found to be incorrect; and Results in a payment greater than that to which the provider is entitled. “Program” has the meaning stated in § 2–501 of this title. “Provider” has the meaning stated in § 2–501 of this title. “Statistically valid sampling methodology” means a methodology used for extrapolation that has a confidence level of 90% or greater and is validated by a statistician who possesses at least a master’s degree in statistics. “Universe” means a defined population of claims submitted by a provider to the Department and paid to the provider by the Department during a specified time period.