Statistics
Distribution
The way in which the values of a variable are spread out or distributed across all possible values.
What is Distribution?
A statistical distribution describes the frequency, probability, or pattern of occurrence of different outcomes for a given variable. It can be represented graphically or mathematically.
Why Distribution Matters
Understanding the distribution of a variable dictates which statistical tests are appropriate to use and reveals fundamental properties about the phenomenon being studied.
Example
A researcher plots the distribution of human heights in a population and observes a bell-shaped curve, indicating that most people cluster around an average height.
Common Mistakes
- Assuming all continuous data must follow a bell curve or specific distribution.
- Applying statistical tests that assume a specific distribution without checking the actual empirical distribution of the data.