Regression Quiz

What is the primary purpose of regression analysis in machine learning?

• Classifying images

• Predicting continuous variables

• • Reducing dataset dimensions

• Clustering similar data

Which of the following is a dependent variable also known as?

• Explanatory variable

• Covariate

• Target variable

• Domain point

What does the regression model aim to establish?

• • Relationship between independent variables

• • Relationship between an independent and a dependent variable

• Clusters of input data

• Feature importance only

What is the main difference between correlation and causation?

• Correlation implies cause and effect

• Correlation is random, causation is systematic

• Correlation is a relationship; causation implies one variable affects another

• Causation is used in unsupervised learning

Which plot is commonly used to visually examine correlation?

• Bar graph

• Scatter plot

• Pie chart

• Histogram

When is Ridge Regression particularly useful?

• When features are categorical

• When there is multicollinearity

• When outliers are present

• When data is missing

What is the effect of Lasso Regression on model coefficients?

• Increases all coefficients

• Makes coefficients zero to select features

• Converts coefficients into binary

• Has no effect

What kind of model does Polynomial Regression create?

• A logistic function

• A straight-line model

• • An nth-degree polynomial curve

• A tree-like structure

Which type of regression is used when the relationship between the variables can be represented as a straight line?

• Logistic Regression

• • Polynomial Regression

• • Linear Regression

• Ridge Regression

What distinguishes multiple regression from simple linear regression?

• It predicts multiple dependent variables

• • It uses multiple dependent and independent variables

• It uses two or more independent variables

• It fits a non-linear curve to the data