MLA-C01 Concept drift Practice Question

Correct answer & explanation

Concept drift refers to any change in the statistical relationship between input features and the target variable, including changes in the target variable distribution. The scenario describes a change in the target variable distribution, which is a form of concept drift, specifically prior probability shift. Option A (Prior probability shift) is indeed a subtype of concept drift, but it is more specific; the question asks for the general drift type, making concept drift the best answer. Option C (Data drift) refers to changes in the distribution of input features, not the target. Option D (Covariate shift) is a form of data drift where the input distribution changes while the conditional distribution P(Y|X) remains unchanged.