Question: 1. You are given the following data: Time death Class 12 Y A 6 Y B 10 N B 10 Y B 6 Y A

1. You are given the following data: Time death Class 12

1. You are given the following data: Time death Class 12 Y A 6 Y B 10 N B 10 Y B 6 Y A 9 N A 12 Y B Assuming Cox Regression Model, write down the exact likelihood function and its Efron approximation. Interpret the meaning of the model parameters

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