A statistical distribution describes the numbers of times each possible outcome occurs in a sample. The components that make up a distribution are mean, median, mode, range, and standard deviation. It is usually portrayed using a frequency polygon or a histogram.

In this section, we will explore different types of distributions such as Binomial, Poisson, and Normal distributions.
The example below shows how different parameters affect the shapes of the different types of distributions.

Source: http://shiny.snap.uaf.edu/RV_distributionsV4/