# Bernoulli distribution

How would you relate a bernoulli distribution to a binomial distribution. It seems that bernoulli distributions are part of binomial distributions?

dist(X) = Bernoulli§ then, Y = X0+X1+X2+X3+… Xn, and dist(Y) =Binomial(n, p) flip a coin once is a bernoulli distribution, and flip a coin n times and count the heads is a binomial distribution.

Bernoulli is not a distribution. Binomial is a distribution, and Bernoulli is a trial that follows a Binomial distribution.

That may be what wikipedia says and it may be true, but that’s not how CFA has it. If a question asks what type of distribution this is an example of, and lists both Binomial and Bernoulli, the answer is Binomial.

CFAI Practice Exam 2, question 13.

jdane416 Wrote: ------------------------------------------------------- > That may be what wikipedia says and it may be > true, but that’s not how CFA has it. If a > question asks what type of distribution this is an > example of, and lists both Binomial and Bernoulli, > the answer is Binomial. I think that a question couldn’t show you outcomes from a Bernoulli distribution and ask wheter it was Bernoulli or Binomial because both would be true. I’m sure CFAI has this right (and Wiki has this right)