Decision Theory

Decision Theory

• Decision problem
  • Possible actions aÎA
  • Possible states of the world sÎS
  • Consequences c(s,a)
  • Goal: choose best action
• Ingredients of a decision theoretic model
  • Utility function u(c) expresses preferences for consequences
  • Probability P(s|a) expresses knowledge/uncertainty for states
  • The best action maximizes expected utility

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