In this module, we’ll discuss the following various statistical approached utilized in Six Sigma.

## 1. The Purpose of Basic Statistics

The purpose for statistics in Six Sigma are the following:

- Provide a numerical summary of the data being analyzed.
- Provide the basis for making inferences about the future.
- Provide the foundation for assessing process capability.
- Provide a common language to be used throughout the organization.

Statistics is the basic language of Six Sigma. A good understanding of statistics is the foundation upon which many of the subsequent tools will be used.

### 1.2 Statistical Notation Cheat Sheet

Don’t bother memorizing any of this, but refer to this as needed.

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