To accompany Hawkes lesson 2.2b (vi) Original content by D.R.S. Stem and Leaf Plots To accompany Hawkes lesson 2.2b (vi) Original content by D.R.S.

What is a Stem and Leaf Plot? Each data value is viewed as: A stem – the leading digit(s) A leaf – the trailing digit(s) Each stem is written once Next to the stem, all the leaves associated with that stem

Quick Little Example – Exam Scores Observations about data: Lowest is 42 Highest is 100 Design decision: So let’s take the hundreds and tens positions as the stem And the ones digit as the leaf. 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

Set up the stems STEM LEAF 4 5 6 7 8 9 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

Fill in the leaves STEM LEAF 4 5 6 7 8 9 2 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

Fill in the leaves STEM LEAF 4 5 6 8 7 7 1 9 2 7 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

Fill in the leaves STEM LEAF 4 5 6 8 7 7 1 5 8 2 0 9 2 7 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

Fill in the leaves STEM LEAF 4 5 6 8 7 7 1 9 5 8 2 0 7 9 2 7 5 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

Fill in the leaves STEM LEAF 4 2 5 6 8 5 7 7 1 9 8 5 8 2 0 7 7 9 2 7 5 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

Fill in the leaves STEM LEAF 4 2 5 6 8 5 7 7 1 9 8 5 8 2 0 7 7 7 7 9 2 7 5 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

The completed Stem and Leaf Plot 4 2 5 6 8 5 7 7 1 9 8 5 8 2 0 7 7 7 7 9 2 7 5 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100

An Ordered Stem and Leaf Plot 4 2 5 6 5 8 7 1 7 9 8 0 2 5 7 7 7 7 8 9 2 5 7 10 85 92 77 71 68 97 88 82 80 79 95 87 65 42 100