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Model Fit and Performance Metrics

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Questions and Answers

What is one of the benefits of cross-validation in model evaluation?

It simplifies the model training process
It eliminates the need for hyperparameter tuning
It reduces computational resources required
It provides a more accurate estimate of model performance (correct)

What is the primary goal of overfitting detection in machine learning?

To detect if the model is overfitting to the training data (correct)
To reduce the computational resources required
To eliminate the need for hyperparameter tuning
To simplify the model training process

What is the purpose of adding a penalty term to the cost function in regularization?

To eliminate the need for hyperparameter tuning
To discourage the model from learning complex patterns (correct)
To increase the complexity of the model
To reduce the learning rate of the model

What is the concept of heteroscedasticity in regression modeling?

Varying variance of residuals across all levels of the independent variables (D) Signup and view all the answers

What is the effect of heteroscedasticity on the assumptions of linear regression?

It violates the assumption of constant variance of residuals (A) Signup and view all the answers

What is the primary benefit of cross-validation in hyperparameter tuning?

It provides a more comprehensive evaluation of the model's performance (C) Signup and view all the answers

What is the difference between Lasso and Ridge regularization techniques?

Lasso uses L1 regularization, while Ridge uses L2 regularization (B) Signup and view all the answers

Why is cross-validation important in machine learning?

It provides a more accurate estimate of model performance on unseen data (B) Signup and view all the answers

What is the primary benefit of regularization in regression models?

It prevents overfitting by adding a penalty term to the cost function (D) Signup and view all the answers

What is the effect of heteroscedasticity on the parameters of linear regression?

It leads to inefficient parameter estimates (A) Signup and view all the answers

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