Match each data analysis technique to its primary purpose.
Drag a concept onto its matching description — or click a concept then click the description.
Model relationships between variables
Group similar data points without labels
Analyze data points collected over time
Compare means across multiple groups
Test association between categorical variables
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Regression: Predicting a continuous outcome variable based on one or more predictor variables
The correct matches are: Regression with predicting continuous outcomes, Clustering with grouping similar data, Classification with assigning categories, and PCA with reducing dimensionality. Common confusions include swapping regression and clustering definitions.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Regression: Predicting a continuous outcome variable based on one or more predictor variables
Why this is correct
Regression is used to model the relationship between a dependent variable and independent variables, typically for prediction or forecasting.
Clustering: Grouping a set of objects so that objects in the same group are more similar to each other than to those in other groups
Why this is correct
Clustering is an unsupervised learning technique that partitions data into groups based on similarity.
Classification: Assigning a label or category to an observation based on its features
Why this is correct
Classification is a supervised learning method that predicts categorical labels for input data.
Principal Component Analysis: Reducing the dimensionality of a dataset while preserving as much variability as possible
Why this is correct
PCA is a technique for dimensionality reduction that transforms data into a set of orthogonal components.
Regression: Grouping similar data points together
Why it's wrong here
Incorrect — this describes clustering, not regression.
Clustering: Predicting a continuous outcome variable
Why it's wrong here
Incorrect — this describes regression, not clustering.
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This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.