You are applying for a position at AWS and your interviewer wants to know more about your sentiment classification skills on products sold by amazon.com

All reviews are classified by a labeling subcontractor (e.g. AWS Mechanical Turk) as having positive ( = 1) or negative ( = 0) sentiment. The interviewer asks you to explain all the steps of designing a sentiment classifier based on Logistic Regression.

Decision Boundary - Write the expression for the decision boundary assuming that ( = 1) = ( = 0)