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probability Definition

prob·abil·ity (präb′ə bilə tē)

noun pl. -·ties

  1. the quality or state of being probable; likelihood
  2. something probable
  3. Math. the ratio of the number of times something will probably occur to the total number of possible occurrences

Etymology: MFr probabilité < L probabilitas

probability Idioms

in all probability

very likely

probability Synonyms

probability

n.

likelihood, possibility, contingency, hazard, plausibility, reasonableness, conceivability, prospect, likeliness, promise, possibility, chance, credibility, expectation, presumption, anticipation, practicability, feasibility, odds; see also chance 1, possibility 2.

Antonyms doubt*, improbability*, doubtfulness.

probability Usage Examples

Preposition: of

  • occurrence: And those payoffs are not strictly aligned with their probabilities of occurrence.

Converse of object

  • calculate: Intuitively, there would appear to be no problem in calculating these probabilities: Consider the possible events in a given time interval.
  • assign: Therefore what we need are statistical techniques that allow us to assign a probability to the outcome of an experiment.
  • compute: Finally we may simply observe the system as a " black box " where we compute the probability of failure from past experience.
  • predict: The census data center the predicted probability to face some.

Adjective modifier

  • posterior: What conclusions do you draw from the computation of the posterior probability?
  • conditional: Statistical classifiers, for example, require data to estimate conditional probabilities.
  • pre-test: The pre-test probability of pulmonary embolic disease should be determined.
  • inverse: Note The passage on inverse probability is reproduced in Likelihood and Probability in R. A. Fisher's Statistical Methods for Research Workers.
  • unconditional: We consider networks with heterogeneous a-priori conditional and unconditional failure probability.
  • binomial: By now our pupils are calculating binomial probabilities almost without realizing it.

Modifies a noun

  • density: The first is a full Bayes solution where the full probability density function of the model outputs is produced.
  • distribution: The posterior probability distribution explains what is known about a parameter given observed data.
  • estimator: This is achieved through a statistical interpretation of connectionist networks as probability estimators.
  • p: Each person in every layer dies with probability p at each iteration.
  • amplitude: The final probability of an event is then obtained by the sum of the squares of the two numbers describing the resultant probability amplitude.

Noun used with modifier

  • priori: The specification of different a priori probabilities can greatly affect the accuracy of the prediction.
  • disabilitythe: Set of interactions of workers a disabilitythe probability the health insurance.
  • non-zero: All children born as members of the MCS population should have a known and non-zero probability of being included in the selected sample.
  • transition: In a formal argument we claim the transition probability of OK to ERROR is zero.
probability Quotes

But to us, probability is the very guide of life.

—Butler,Joseph

Browse dictionary entries near probability

  1. probabilistic
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  5. proa
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  10. pro-
  1. probable
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  3. probably
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  5. probang
  6. probate
  7. probate court
  8. probation
  9. probation officer
  10. probationer