What two variables are found in decision trees?

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Study for the ACVPM Epidemiology and Biostatistics Exam. Prepare with flashcards and multiple choice questions, with hints and explanations for each. Be exam-ready!

Multiple Choice

What two variables are found in decision trees?

Explanation:
In decision-tree analysis, two quantities drive the evaluation: probabilities and utilities. Probabilities assign how likely each uncertain branch is, while utilities measure the desirability or value of each final outcome. To compare strategies, you compute the expected utility by weighting each outcome’s utility by its probability and summing across all possible paths. This combines uncertainty with preferences, letting you choose the option with the highest expected utility. Scarcity, stage, or cost alone don’t capture both essential elements together in this framework, whereas probability and utility do.

In decision-tree analysis, two quantities drive the evaluation: probabilities and utilities. Probabilities assign how likely each uncertain branch is, while utilities measure the desirability or value of each final outcome. To compare strategies, you compute the expected utility by weighting each outcome’s utility by its probability and summing across all possible paths. This combines uncertainty with preferences, letting you choose the option with the highest expected utility. Scarcity, stage, or cost alone don’t capture both essential elements together in this framework, whereas probability and utility do.

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