Definition of Probability

 

[L:89] The probable "is to be regarded as an approximation to certainty". Whatever is probable "is to be understood a holding-to-be-true [i.e., a judgment that something is true] out of insufficient reasons, which, however, bear a greater proportion to the sufficient ones than the reasons of the opposite. Kant discusses "the logic of possibility".

(n.)
The quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood.
  

(n.)
That which is or appears probable; anything that has the appearance of reality or truth.
  

(n.)
Likelihood of the occurrence of any event in the doctrine of chances, or the ratio of the number of favorable chances to the whole number of chances, favorable and unfavorable. See 1st Chance, n., 5.
  

---

probability
you can click anywhere, but just don't click here.
probability
\prob`a*bil"i*ty\, n.; pl. probabilities (#). [l. probabilitas: cf. f. probabilité.]
1. the quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood. probability is the appearance of the agreement or disagreement of two ideas, by the intervention of proofs whose connection is not constant, but appears for the most part to be so.
2. that which is or appears probable; anything that has the appearance of reality or truth. the whole life of man is a perpetual comparison of evidence and balancing of probabilities. we do not call for evidence till antecedent probabilities fail. h. newman.
3. (math.) likelihood of the occurrence of any event in the doctrine of chances, or the ratio of the number of favorable chances to the whole number of chances, favorable and unfavorable. see 1st chance, n., 5.

---

  similar words(5) 

---

---

 neutrosophic probability 
 in all probability 
 imprecise probability 
 tautological probability 
 intuitionistic probability 

---

Noun
1. a measure of how likely it is that some event will occur; "what is the probability of rain?"; "we have a good chance of winning"
(synonym) chance
(hypernym) measure, quantity, amount
(hyponym) conditional probability, contingent probability
2. the quality of being probable
(antonym) improbability, improbableness
(hypernym) quality
(hyponym) likelihood, likeliness, odds

A term referring to the likelihood of occurrence of an event, action or item.

The relative likelihood of a particular outcome among all possible outcomes.

1. giving a measurement(value) of the likelihood that a certain outcome will occur, act as a link between descriptive and inferential statistics
2. a number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences.

Likelihood of an event occurrence.

The ratio of the number of likely outcomes to the number of possible outcomes.

A number between and inclusive of zero and one indicating the likelihood of an event. Two kinds of probabilities are distinguished. (1) The logical interpretation of probability indicates how easy it would be to select one designated or preferred alternative out of a given set of possible alternatives (see degree of freedom ). (2) The frequency interpretation of probability indicates how often a particular event is observed relative to all observed events. Whereas (1) is concerned with possibilities and makes no references to actual observations, (2) is concerned only with what was observed, not with what could be but wasn't. Despite the fundamental differences between the two, both conform to the same laws of probability theory. Let M be a set of elements (possibilities or observations). With 0 as the empty set. The probabilities of subsets A of M range between:
0 < P(A) < 1
For any set A and its complement A in M:
P(A and not A) = P(0) = 0
P(A or not A) = P(M) = 1
and for mutually exclusive sets A_i:
P(A_1 or A_2 or...) = P(A_1) + P(A_2) +....
the space of possibilities on the one side and the sample size of observations on the other assure that probabilities add up to 1. (Krippendorff )

See more at Wikipedia.org...

The chance of observing a particular future event; a simple ratio of the number of observed events divided by the total number of possible events.
  

(1) The likelihood that a given event will occur. (2) (Statistics) A number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences.

A branch of mathematics that measures the likelihood that an event will occur.  Probabilities are expressed as numbers between 0 and 1.  The probability of an impossible event is 0, while an event that is certain to occur has a probability of 1.

yesik'es

The long term frequency of an event relative to all alternative events, and usually expressed as decimal fraction.

Medicine is to a significant degree based on probability theory. Probability in this context is the likelihood of something happening. The abbreviation for probability is P. For example, P<0.05 indicates that the probability of something occurring by chance alone is less than 5 in 100, or 5%. As a matter of fact, P<0.05 is usually taken as the level of biologic significance where a result may be considered meaningful.