Techinques for Filling Missing Values

There are many methods to fill missing values in a dataset while cleaning.

  1. Ignore the tuple
  2. Fill in the missing values manually – Time consuming not practical with large datasets
  3. Use a global constant to fill in the missing value – Ie replace all missing values with unknown or something similar
  4. Use a measure of central tendency for the attribute such as mean, median etc
  5. Use the most probable value to fill the missing value