Data Science Miscellaneous - Study Mode

[#226] What does the term "imputation" refer to in data preprocessing?
Correct Answer

(B) Filling in missing values in a dataset

[#227] In machine learning, what is the term for the process of selecting the most important features for a model?
Correct Answer

(C) Feature selection

[#228] What is the primary purpose of the "Confusion Matrix" in the evaluation of classification models?
Correct Answer

(D) To display the counts of true positive, true negative, false positive, and false negative predictions

[#229] In data science, what is the primary goal of dimensionality reduction techniques like Principal Component Analysis (PCA)?
Correct Answer

(A) To reduce the number of features while preserving important information

[#230] What does the acronym "ETL" stand for in the context of data warehousing?
Correct Answer

(D) Extract, Transform, Load