additive law of probability
qânun-e bardâyeši-ye šavânâyi
Fr.: loi additive de probabilité
If E1, E2, ..., En are n → mutually exclusive events, then the probability of occurrence of at least one of them is the sum of their individual probabilities: P(E1 + E2 + ... + En) = P(E1) + P(E2) + ... + P(En).
Fr.: probabilité conditionnelle
Of an event B in relationship to an event A, the probability that event B occurs given that event A has already occurred. The notation for conditional probability is P(B|A), read as the probability of B given A: P(B|A) = P(A ∩ B)/P(A). → Bayes' theorem.
conservation of probability
pâyeš-e šavânâyi, pâyandegi-ye ~
Fr.: conservation de probabilité
A principle according to which the sum of probabilities of all possible states that might come out of an initial state equals the probability of the initial state.
Fr.: probabilité objective
A probability determined by the long-term frequency of an event; in contrast to subjective probability.
1) General: The quality or fact of being probable. A strong
→ likelihood or chance of something.
Fr.: courbe de probabilité
A curve that describes the distribution of probability over the values of a random variable.
probability density function
karyâ-ye cagâli-ye šavânâyi
Fr.: fonction de densité de probabilité
A mathematical function whose integral over any interval gives the probability that a continuous → random variable has values in this interval. Also known as → density function, frequency function, → probability function.
Fr.: distribution de probabilité
The function that describes the range of possible values that a random variable can attain and the probability that the value of the random variable is within any (measurable) subset of that range.
Fr.: fonction de probabilité
A function that represents a probability distribution in terms of integrals. Also called probability density function or density function.
Fr.: théorie des probabilités
A branch of → mathematics with its own axioms and methods, which is based on the concept of → randomness and is concerned with the possible outcome of given → events and their relative → likelihoods and → distributions.
Fr.: probabilité de transition
The probability that a quantum-mechanical system will make a transition from a given initial state to a given final state.