When should you disable WiFi on your Phone?单项选择题

A

When you sit at your exam desk

B

When you enter the exam hall

C

After you have done your 2 factor Auth

D

As you arrive at the exam venue outside

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A researcher is analysing the time until job loss for a sample of workers. The following Cox proportional hazards model has been estimated: where •  Training = 1 if participated in job training, 0 otherwise •  Age = age of worker •  Union = 1 if union member, 0 otherwise (a) Explain the structure of this Cox proportional hazards model. What does the baseline hazard represent, and what does the proportional hazards assumption imply? [2] (b) Describe the partial likelihood estimation method for estimating the coefficients here. [4] (c) Calculate the hazard ratio for the following two individuals and interpret the result. Individual A: Age = 40, Training = 1, Union = 0 Individual B: Age = 40, Training = 0, Union = 0 [4][Fill in the blank]

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