## 1.4 Basic Matrix Applications

### Using Matrices to Present Information

- Matrices can be used to present information in a
**tabular form**. - Similar to 2-way frequency tables, two categorical datasets are listed as the rows and columns, respectively, and each element represents a numerical value corresponding to the category in its row and column.
- When presenting data in a matrix, the
**categories**should be listed at the top of each column, and to the left of each row.