# Bernoulli experiment

### From Conservapedia

A **Bernoulli experiment** (or **Bernoulli trial**) is the simplest non-trivial random experiment imaginable: it's an experiment of which the outcome is random and can be either of two possibilities: *success* and *failure*.

The standard example is *tossing a coin*.

## Expectation and Variance

If the occurrence of a success is encoded as **1** and the occurrence of a failure with **0**, then a probability of a success of *p* (and therefore, of a failure as *q=1-p*) leads to an expectation of

The variance is .

The sum of *n* Bernoulli experiments with the same probability of success *p* follows a Binomial distribution *B(n,p)*.