1. Chapter 2: Organizing Data
Section 3: Stem and Leaf Displays

2. Stem and Leaf Plots
A way of organizing data values, usually tens digit is the “stem” and ones digit is the “leaf”, useful for spotting outliers.

3. Stem and Leaf Example
Create a stem and leaf plot for the following data.
10, 26, 18, 9, 12
1I0 = 10

4. Outliers
Individual data values that are atypical because they stand considerably apart from the general pattern of the data.
Class Average Example:
Class averages are 80, 87, 90, 75, 100, 13, 80.
13 would be the outlier in this set of data.

5. Example Create a stem and leaf plot of the following data: 45

6. Example Answer
1 9