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Exercise

Evaluating performance with yardstick

In the previous exercise, you calculated classification metrics from a sample confusion matrix. The yardstick package was designed to automate this process.

For classification models, yardstick functions require a tibble of model results as the first argument. This should include the actual outcome values, predicted outcome values, and estimated probabilities for each value of the outcome variable.

In this exercise, you will use the results from your logistic regression model, telecom_results, to calculate performance metrics.

The telecom_results tibble has been loaded into your session.

Instructions 1/4

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  • 1
    • Use the appropriate yardstick function to create a confusion matrix using the telecom_results tibble.
  • 2
    • Calculate the accuracy of your model with the appropriate yardstick function.
  • 3
    • Calculate the sensitivity of your model.
  • 4
    • Calculate the specificity of your model.