Data Science Academy · Lesson

Impute With Mean, Median, or Mode

Sensible fills per column type.

Filling With a Statistic

Instead of inventing random numbers, you fill gaps with a summary value from the column itself. This careful approach is called imputation. 🧮

For numbers, the simplest choice is the mean, the column average. It keeps the overall total roughly intact when gaps are few.

df['age'].fillna(df['age'].mean())