accuracy

Personal data shall be accurate and, where necessary, kept up to date

A qualitative assessment of correctness or freedom from error.

The measure of an instrument's capability to approach a true or absolute value. It is a function of precision and bias.

measure of closeness of results of observations, computations, or estimates to the true values or the values accepted as being true

Closeness of computations or estimates to the exact or true values that the statistics were intended to measure.

The accuracy of a machine learning system is measured as the percentage of correct predictions or classifications made by the model over a specific data set. It is typically estimated using a test or "hold out" sample, other than the one(s) used to construct the model. Its complement, the error rate, is the proportion of incorrect predictions on the same data.

the quality of being near to the true value

(mathematics) the number of significant figures given in a number