Fix get_dummies: Only 3 region columns created instead of 4

[arzaanxeng]

Problem

pd.get_dummies(..., drop_first=True) was automatically dropping the first region category (northeast) in alphabetical order. This resulted in only 3 dummy columns instead of 4.

Changes Made

• Changed drop_first=True to drop_first=False
• Added explicit drop of region_northeast as the reference category (best practice for regression models)

This makes the behavior clearer and avoids confusion.

[arzaanxeng]

Hi Akarsh,

I saw that only 3 dummy columns were being created for the region column due to drop_first=True.

I’ve fixed it by creating all 4 columns and then explicitly dropping region_northeast as the reference category (standard practice in machine learning to avoid multicollinearity).

Let me know if you have any feedback or want it done differently!