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

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.

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

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.

Example Create a stem and leaf plot of the following data: 32 47 54 36 44 56 49 53 51 35 29 62 19 65 37 48 33 41 45

Example Answer 1 9 2 7 9 3 2 3 5 6 7 4 1 4 5 7 8 9 5 1 3 4 6 6 2 5