![]() Where C( n, x) = and n! = n( n –1)( n –2)⋯3∙2∙1 as described in Combinatorial Functions.Ĭ( n, x) can be calculated by using the Excel function COMBIN( n,x). Then the probability distribution function for x is called the binomial distribution, B( n, p), whose frequency function (aka probability density function) is ![]() Let x be the discrete random variable whose value is the number of successes in n trials. for each trial, the probability of success is p (and so the probability of failure is 1 – p)Įach such trial is called a Bernoulli trial. ![]()
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