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What is a decision network?

  • A.A network representing the decisions of several agents
  • B.A network whose nodes are the decisions available to an agent
  • C.A network used to decide which Bayesian model to adopt
  • D.A Bayesian network extended with decision and utility nodes

Answer: D

Adding rectangular decision nodes and a diamond utility node to a Bayesian network gives a single structure over which the maximum expected utility action can be computed. It unifies the probabilistic and the decision theoretic parts of a problem. Multi agent networks, decision only graphs and model selection are different notions. Extending a representation with two node types, rather than building a separate formalism, is an economical way to add decision making to a probabilistic model.

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