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Il modello di Cox. Conditional on the fact that one individual is observed to fail at t ( j ) , the probability that it is an individual with covariates x j is. The function describing the failure pattern is the product of J terms, one for each observed failure time.
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Conditional on the fact that one individual is observed to fail at t(j), the probability that it is an individual with covariates xj is
The function describing the failure pattern is the product of J terms, one for each observed failure time