There are two main types of Distribution we are concerned with in statistics:

__Frequency Distributions:__
A graph representing the frequency of each outcome occurring.

__Probability Distributions:__
A graph that provides the probability of each outcome occurring.

**The most common distribution shapes are:**
**Symmetric:**
**Bell-shaped:**
**Skewed to the left:**
**Skewed to the right:**
**Uniform:**
**Cluster:**
On a graph a cluster is when several data points lie close together. Typically this means that these data points have similar characteristics, which is also called things are

__homogeneous__ (Things which are very diverse or dissimilar are called

__heterogeneous__)

**Gap:**
A gap is an interval which contains no data.

**Peak:**
A peak is the highest point of a data set.