In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Cross-validation, sometimes called rotation estimation, or out-of-sample testing is any of various similar model validation techniques for assessing how the results of a statistical analysis will generalize to an independent data set. It is mainly used in settings where the goal is prediction, and one wants to estimate how accurately a predictive model will perform in practice. In a prediction problem, a model is usually given a dataset of known data on which training is run (training dataset), and a dataset of unknown data (or first seen data) against which the model is tested (called the validation dataset or testing set )., The goal of cross-validation is to test the model's ability to predict new data that was not used in estimating it, in order to flag problems like overfitting or selection bias and to give an insight on how the model will generalize to an independent dataset (i.e., an unknown dataset, for instance from a real problem).
cross-validation of findings from a prediction study is particularly important for

Just like other affines, or 'in-laws', siblings-in-law are related by a type of kinship called affinity. Just like the children of one's siblings, the children of one's siblings-in-law are called simply nieces and nephews -- if necessary, specified whether 'by marriage', as opposed to 'by blood' or 'by adoption'.
who is your sister inlaws daughter to you

The design of experiments (DOE, DOX, or experimental design) is the design of any task that aims to describe or explain the variation of information under conditions that are hypothesized to reflect the variation. The term is generally associated with true experiments in which the design introduces conditions that directly affect the variation, but may also refer to the design of quasi-experiments, in which natural conditions that influence the variation are selected for observation.

the objective of design of experiments (doe) is to