p represents the population proportion.Jul 7, 2019
P() requires special fonts, which is a disadvantage. Pr() may be useful when the author would want the reader to think of probability in abstract and general terms, using the second lower-capital letter "r" to disassociate the symbol as a whole from the usual way we write up functions.Jul 18, 2014
ProbabilityP(A) - probability that event A will occur.P(A|B) - conditional probability that event A occurs, given that event B has occurred.P(A′) - probability of the complement of event A.P(A∩B) - probability of the intersection of events A and B.P(A∪B) - probability of the union of events A and B.More items...
independence\! \perp yields ⊥⊥ which is often used to denote independence, e.g. X⊥⊥Y.Apr 24, 2017
Joint probability: p(A and B). The probability of event A and event B occurring. It is the probability of the intersection of two or more events. The probability of the intersection of A and B may be written p(A ∩ B). Example: the probability that a card is a four and red =p(four and red) = 2/52=1/26.
Greek letters (e.g. θ, β) are commonly used to denote unknown parameters (population parameters). A tilde (~) denotes "has the probability distribution of".
P(A U B) is the probability of the sum of all sample points in A U B. Now P(A) + P(B) is the sum of probabilities of sample points in A and in B. Since we added up the sample points in (A ∩ B) twice, we need to subtract once to obtain the sum of probabilities in (A U B), which is P(A U B).
P(A∩B) is the probability of both independent events “A” and "B" happening together. The symbol "∩" means intersection. This formula is used to quickly predict the result.
Union The union of two sets A and B, written A U B, is the combination of the two sets. Intersection The intersection of two sets A and B, written AnB, is the overlap of the two sets.Feb 3, 2013