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Binomial distribution

In probability theory and statistics, the binomial distribution with parameters n and p is the discrete probability distribution of the number of successes in a sequence of n independent experiments, each asking a yes–no question, and each with its own Boolean-valued outcome: success (with probability p) or failure (with probability q = 1 − p). A single…

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CDF
I q ( n − ⌊ k ⌋ , 1 + ⌊ k ⌋ ) {\displaystyle I_{q}(n-\lfloor k\rfloor ,1+\lfloor k\rfloor )} (the regularized incomplete beta function)
CF
( q + p e i t ) n {\displaystyle (q+pe^{it})^{n}}
Entropy
1 2 log 2 ⁡ ( 2 π e n p q ) + O ( 1 n ) {\displaystyle {\frac {1}{2}}\log _{2}(2\pi enpq)+O\left({\frac {1}{n}}\right)} in shannons. For nats, use the natural log in the log.
Excess kurtosis
1 − 6 p q n p q {\displaystyle {\frac {1-6pq}{npq}}}
Fisher information
g n ( p ) = n p q {\displaystyle g_{n}(p)={\frac {n}{pq}}} (for fixed n {\displaystyle n} )
Mean
n p {\displaystyle np}

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Binomial distribution

Nodes104
Edges103
Triples85
Avg. degree1.98
Density0.019231
Components1

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Binomial distribution

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related to Further reading · 20
Binomial distribution → Allyn, Applied Statistics, Bacon, Boston, Failure, Hirsch, How Likely Are They, Introduction, ISBN, John, MacMillan, Modern Statistics, Neter, New York, Success, Third, Wasserman, Werner, Whitmore, William
related to Probability mass function · 8
Binomial distribution → Bernoulli, If, In, Pr, Since, The, There, This
related to Beta distribution · 7
Binomial distribution → Bayesian, Bernoulli, Beta, Given, Mathematically, PMF, The
related to Median · 6
Binomial distribution → Any, However, If, In, The, When
related to Poisson approximation · 6
Binomial distribution → According, Concerning, Novak, Poisson, The, Therefore
related to Random number generation · 6
Binomial distribution → Methods, One, Pr, Then, These, To
see also · 5
Binomial distribution → Boolean, Logistic, Mathematics, Statistical, XOR-ing
is a · 4
Binomial distribution → basis for the binomial test of statistical significance.The binomial distribution is frequently used to model the number of successes in a sample of size n drawn with replacemen…, Bernoulli distribution, PMF of k successes given n independent events each with a probability p of success, special case of the Poisson binomial distribution
related to Bernoulli distribution · 4
Binomial distribution → Bernoulli, Conversely, Symbolically, The Bernoulli
related to Poisson binomial distribution · 3
Binomial distribution → Bernoulli, Poisson, The

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Important terminology

displaystyle distribution binomial 1-p frac probability np left right bernoulli number independent normal sqrt mode one operatorname using n-k approximation

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SubjectPredicateObjectConfidenceSrc
Binomial distributionCDFI q ( n − ⌊ k ⌋ , 1 + ⌊ k ⌋ ) {\displaystyle I_{q}(n-\lfloor k\rfloor ,1+\lfloor k\rfloor )} (the regularized incomplete beta function)1.00infobox
Binomial distributionCF( q + p e i t ) n {\displaystyle (q+pe^{it})^{n}}1.00infobox
Binomial distributionEntropy1 2 log 2 ⁡ ( 2 π e n p q ) + O ( 1 n ) {\displaystyle {\frac {1}{2}}\log _{2}(2\pi enpq)+O\left({\frac {1}{n}}\right)} in shannons. For nats, use the natural log in the log.1.00infobox
Binomial distributionExcess kurtosis1 − 6 p q n p q {\displaystyle {\frac {1-6pq}{npq}}}1.00infobox
Binomial distributionFisher informationg n ( p ) = n p q {\displaystyle g_{n}(p)={\frac {n}{pq}}} (for fixed n {\displaystyle n} )1.00infobox
Binomial distributionMeann p {\displaystyle np}1.00infobox
Binomial distributionMedian⌊ n p ⌋ {\displaystyle \lfloor np\rfloor } or ⌈ n p ⌉ {\displaystyle \lceil np\rceil }1.00infobox
Binomial distributionMGF( q + p e t ) n {\displaystyle (q+pe^{t})^{n}}1.00infobox
Binomial distributionMode⌊ ( n + 1 ) p ⌋ {\displaystyle \lfloor (n+1)p\rfloor } or ⌈ ( n + 1 ) p ⌉ − 1 {\displaystyle \lceil (n+1)p\rceil -1}1.00infobox
Binomial distributionNotationB ⁡ ( n , p ) {\displaystyle \operatorname {B} (n,p)}1.00infobox
Binomial distributionParametersn ∈ { 0 , 1 , 2 , … } {\displaystyle n\in \{0,1,2,\ldots \}} – number of trials p ∈ [ 0 , 1 ] {\displaystyle p\in [0,1]} – success probability for each trial q = 1 − p {\display…1.00infobox
Binomial distributionPGFG ( z ) = [ q + p z ] n {\displaystyle G(z)=[q+pz]^{n}}1.00infobox
Binomial distributionPMF( n k ) p k q n − k {\displaystyle {\binom {n}{k}}p^{k}q^{n-k}}1.00infobox
Binomial distributionSkewnessq − p n p q {\displaystyle {\frac {q-p}{\sqrt {npq}}}}1.00infobox
Binomial distributionSupportk ∈ { 0 , 1 , … , n } {\displaystyle k\in \{0,1,\ldots ,n\}} – number of successes1.00infobox
Binomial distributionVariancen p q = n p ( 1 − p ) {\displaystyle npq=np(1-p)}1.00infobox
Binomial distributionis aBernoulli distribution0.90text
Binomial distributionis abasis for the binomial test of statistical significance.The binomial distribution is frequently used to model the number of successes in a sample of size n drawn with replacemen…0.90text
Binomial distributionis aspecial case of the Poisson binomial distribution0.90text
Binomial distributionis aPMF of k successes given n independent events each with a probability p of success0.90text

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