Stats 1: Statistical Distributions

Question 1

`When can you model a variable with a binomial distribution, B(n,p)?

Answer 1

If:

• there are a fixed number of trials, n
• there are two possible outcomes (success and failure)
• there is a fixed probability of success, p
• the trials are independent of each other

Question 2

What is the probability mass function of the binomial distribution?

Answer 2