Binomial distribution conditions

For us to be able to use a binomial distribution on data, we need a few things to be true:

• There are only two outcomes - success and failure
• The number of trials is fixed (we know exactly how many times we’ll repeat the experiment)
• The probability of success is constant - every trial has the same probability of success, and that probability doesn’t change from trial to trial
• The trials are independent (the outcome of one trial doesn’t affect the outcome of the next trial)