## 1.9 The Normal Distribution

### Overview of the Normal Distribution

- The
**normal distribution**appears often in population and natural distributions. - It is often referred to as the bell curve.
- Normal distributions are assumed to be
**perfectly symmetric**.

Note: this is not always the case in practice, but it is an accurate approximation.

- A key characteristic of the normal distribution is that the
**mean and median are equal**and**correspond to the highest frequency**