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.
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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).

Answer: cross-validation of findings from a prediction study is particularly important for

Question: In India, a Tax Deduction and Collection Account Number (TAN) is a 10 digit (9427583067) number issued to persons who are required to deduct or collect tax on payments made by them under the Indian Income Tax Act, 1961

Answer: what is the meaning of tan in income tax

Question: The origin of the use of 'love' for zero is also disputed. It is possible that it derives from the French expression for 'the egg' (l'uf) because an egg looks like the number zero. This is similar to the origin of the term 'duck' in cricket, supposedly from 'duck's egg', referring to a batsman who has been called out without completing a run. One possibility comes from the Dutch expression iets voor lof doen, which means to do something for praise, implying no monetary stakes. Another theory on the origins of the use of 'love' comes from the acceptance that, at the start of any match, when scores are at zero, players still have 'love for each other'.

Answer:
why is no score in tennis called love