Analyses data objects without consulting class labels is clustering.
What is regression?
For evaluating the associations between a dependent variable and one or more independent variables, regression analysis is a set of statistical procedures. We can say that a linear regression model can describe age and height. Age and height have a linear relationship because height grows with age. Regression models are frequently employed as statistical support for statements about commonplace facts.
Given that,
Unlike classification and regression, which analyze class-labeled (training) data sets
Analyzes data objects without consulting class labels
Therefore, clustering analyzes data objects without consulting class labels
Analyses data objects without consulting class labels is clustering.
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