synonyms: residual sum of squares, sum of squared errors of prediction, sum of squared residuals
initialisms: PRESS, RSS, SSEP, SSR
https://doi.org/10.1351/goldbook.10104
In multivariate calibration for a prediction set of \(N\) data where \(c_{i}\) is an observed value and \(\hat c_{i}\) is the predicted value. \[E_{\rm{PRESS}} = \sum\limits_{i\,=\,1}^{i\,=\,N} (\hat c_{i} - c_{i})^2\]