12.2 First Pass Checklist

EDA steps in Jupyter

1. df.shape, df.head(), df.tail().
2. df.info() and df.isna().sum().
3. df["order_id"].duplicated().sum().
4. df.describe(include="all") — or split numeric / object.
5. df["city"].value_counts() and normalize=True.
6. df["status"].value_counts().
7. pd.crosstab(df["city"], df["status"], margins=True).
8. df.groupby("festival")["amount"].agg(["sum", "mean", "count"]).
9. Write 3 bullet findings in a markdown cell.