Post a New Question


posted by .

The random variable x represents the number of boys in a family with three children.
Assuming that births of boys and girls are equally likely, find the mean and standard
deviation for the random variable x.

  • statistic -

    This is a binomial distribution with parameters
    n=3 (number of trials in the experiment)
    p=1/2 (probability of boys, X)
    q=1-p (probability of girls)

    For a random variable X with a binomial distribution (n,p,q), then
    where σ=standard deviation (of population)

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question