A box plot is a graphical tool that lets you easily visually compare variation between the data sets evaluated. Also makes comparisons quickly and easily.

- Median.
- Maximum.
- Minimum
- First quartile (0-25%)
- Third quartile (75%)

## What Can Box Plots Tell Us?

**Skewness**: By looking at a box plot you can can tell if your data distribution is skewed if the line inside the box is not centered.- Ex. Stock 4’s median is not centered, thus this data is skewed.

**Extreme values:**The vertical lines (whiskers) show max and min values.- Ex. Stock 5 tends towards larger values.

**Median:**The blue horizontal line indicates the median of the group.**25th & 75th Percentiles:**that’s the top and bottom of the box.- Useful in visualizing most of the
**spread of variation**. - Ex. Stock 1 typically has the least variation.

- Useful in visualizing most of the

## Creating a Box Plot

Good article on how to do this in excel.

## Notes on Box Plots

Box Plots, Histograms, and Stem and Leaf plots all display the same data.