Cross Validation Methods
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Questions and Answers

Which type of cross-validation is used when the dataset contains only a small number of examples?

  • Stratified cross-validation
  • Leave one out cross-validation (correct)
  • 2-fold cross-validation
  • k-fold cross-validation
  • What is the purpose of using k-fold cross-validation?

  • To reduce the size of the training set
  • To test the classifier on a single example
  • To obtain k values for accuracy (correct)
  • To obtain a single value for accuracy
  • What is the advantage of using 2-fold cross-validation?

  • It uses large sets both for training and testing (correct)
  • It uses a smaller test set
  • It is used for small datasets
  • It uses a smaller training set
  • What is the main difference between k-fold cross-validation and stratified cross-validation?

    <p>The distribution of labels in each fold</p> Signup and view all the answers

    What is the final accuracy calculated in k-fold cross-validation?

    <p>The mean of the k values of accuracy obtained</p> Signup and view all the answers

    The number of disjoint subsets in k-fold cross-validation is always equal to 5.

    <p>False</p> Signup and view all the answers

    In 2-fold cross-validation, the classifier is built using the whole dataset.

    <p>False</p> Signup and view all the answers

    In stratified cross-validation, each fold has a different distribution of labels.

    <p>False</p> Signup and view all the answers

    Leave one out cross-validation is used when the dataset contains a large number of examples.

    <p>False</p> Signup and view all the answers

    In k-fold cross-validation, the final accuracy is calculated by taking the median of the k values obtained.

    <p>False</p> Signup and view all the answers

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