A为什么错？

问题如下：

In the report on suggested actions to increase the ALPHA model’s accuracy, the suggestion that is most appropriate is:

选项：

A.Suggestion 1.

B.Suggestion 2.

C.Suggestion 3.

解释：

B is correct. Using k-fold cross-validation will increase the overall robustness and accuracy of the underlying model in predicting actual events.

A is incorrect. Increasing the holdout sample, also known as the validation sample, implies reducing the number of records in the training set data, which will reduce the underlying accuracy of the model given that it already has a relatively low number of data records (≈7,000).

C is incorrect. Reducing the size of the training set would reduce the accuracy and precision of the model and increase the likelihood of overfitting to the training set.