Which statement accurately describes the impact of target leakage during the preprocessing phase? Data ScienceHard Try Now
from sklearn.preprocessing import RobustScaler scaler = RobustScaler(quantile_range=(25.0, 75.0)) X_scaled = scaler.fit_transform(X) What is the primary advantage of this approach over StandardScaler? Data ScienceHard Try Now
What is the effect of using K-Nearest Neighbors (KNN) imputation on a dataset with high-dimensional feature space? Data ScienceHard Try Now
Which consequence arises from applying Box-Cox transformation to a feature containing negative values? Data ScienceHard Try Now
What is the primary risk of using mean imputation on a feature that exhibits a non-random missingness mechanism? Data ScienceHard Try Now
Which technique is most effective for handling skewed numerical features before applying a model that assumes normality? Data ScienceHard Try Now
from sklearn.preprocessing import StandardScaler scaler = StandardScaler() X_scaled = scaler.fit_transform(X_train) X_test_scaled = scaler.transform(X_test) Why is it critical to use transform instead of fit_transform on the test set? Data ScienceHard Try Now
What is the effect of applying one-hot encoding to a high-cardinality categorical feature in a linear model? Data ScienceHard Try Now
What is the primary risk of applying Min-Max scaling to a feature containing significant outliers? Data ScienceHard Try Now
