Probability Distribution Function

A statistical function which can be used to evaluate the probability of outcomes for a random variable
Two Types:
- Discrete Random Variable
  - Probability Mass Function $⟺$ Cumulative Distribution Function
- Continuous Random Variable
  - Probability Density Function $⟺$ Cumulative Distribution Function
All distribution functions satisfy two things:
- All probabilities are non-negative and between $0$ and $1$
- Total probability should be $1$