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  • Question: Based on all the input variables, determine the value of k that minimizes the RMSE in a validation procedure.b.Experiment with different subsets of variables as input features and re-calibrate the value of k to minimize the RMSE. How does this k-nearest neighbors model compare to the model obtained in part (a)?c.For the best-performing k-nearest neighbors

    Based on all the input variables, determine the value of k that minimizes the RMSE in a validation procedure.
    b.
    Experiment with different subsets of variables as input features and re-calibrate the value of k to minimize the RMSE. How does this k-nearest neighbors model compare to the model obtained in part (a)?
    c.
    For the best-performing k-nearest neighbors model in the validation procedure, what is the RMSE on the test set?
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    K-Nearest Neighbors Model Optimization

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