Data Science Miscellaneous - Study Mode
[#61] What is the primary goal of exploratory data analysis (EDA)?
Correct Answer
(D) To understand the data's underlying structure and patterns
Explanation
Solution: Exploratory Data Analysis (EDA) is primarily used to gain insights into the data's underlying structure and patterns. It helps in identifying key variables, relationships, and outliers that can influence further analysis. While creating visualizations and collecting data are part of the data analysis process, the core objective of EDA is to understand the data's characteristics and inform the next steps in the analysis.
[#62] What does the term "cross-validation" refer to in machine learning?
Correct Answer
(A) A technique for assessing a model's performance on unseen data
[#63] What is the main purpose of the K-means clustering algorithm?
Correct Answer
(D) To group data points into clusters based on similarity
[#64] Which data visualization technique is suitable for displaying the distribution of a single numerical variable?
Correct Answer
(C) Histogram
[#65] What does the acronym "SQL" stand for in the context of databases?
Correct Answer
(B) Structured Query Language