The other features for these observations appear normal compared to the rest of the sample populationHow should the Data Scientist correct this issue?
Drop all records from the dataset where age has been set to 0.
Replace the age field value for records with a value of 0 with the mean or median value from the dataset
Drop the age feature from the dataset and train the model using the rest of the features.
Use k-means clustering to handle missing features
Explanations:
Dropping all records where age is set to 0 would result in losing a significant portion of the dataset (450 out of 4000 observations), which could lead to a loss of valuable information and potential biases in the model.
Replacing the age field value for records with a value of 0 with the mean or median age from the dataset is a common technique for handling erroneous or missing data. This method preserves the dataset’s size and allows the model to learn from the corrected values, helping improve prediction accuracy.
Dropping the age feature entirely would remove potentially valuable information, especially since age is a significant factor in the context of this study involving patients over 65. The model might fail to capture age-related trends and relationships with patient outcomes.
Using k-means clustering to handle missing features is not appropriate here since age has a known erroneous value (0). K-means is typically used for clustering and does not directly address incorrect or missing values in a way that would correct them effectively for model training.
I gauge that the answer is:
Replace the age field value for records with a value of 0 with the mean or median value from the dataset