In machine learning, an algorithm (or learning algorithm) is said to be unstable if a small change in training data cause the large change in the learned classifiers. True or False: Bagging of unstable classifiers is a good idea

TRUE
nan
nan
nan

The correct answer is False.

Bagging is a machine learning technique that can be used to reduce the variance of a learning algorithm. It works by creating multiple models from different subsets of the training data and then averaging the predictions of the models. This can help to reduce the effect of noise in the training data and improve the accuracy of the model.

However, bagging is not always a good idea. If the learning algorithm is unstable, then bagging can actually make the model worse. This is because bagging amplifies the noise in the training data, which can lead to the models making different predictions for the same data point.

Therefore, it is important to choose a learning algorithm that is not unstable before using bagging. Otherwise, bagging can actually make the model worse.

Here is a more detailed explanation of each option:

  • Option A: True. Bagging of unstable classifiers is a good idea.

This is incorrect because bagging can actually make an unstable classifier worse.

  • Option B: False. Bagging of unstable classifiers is not a good idea.

This is the correct answer.

  • Option C: It depends on the learning algorithm.

This is also a correct answer, but it is not as specific as Option B.