advertisement

Stem-and-Leaf Plots A stem-and-leaf plot can help you compare data. The heights of 11 fourth-grade badminton players are (in inches): • • • • • • 56 61 61 60 59 57 • • • • • 58 58 63 61 59 You can organize this data in a stem-and-leaf plot! First, order your data from least to greatest. • • • • • • 56 57 58 58 59 59 • • • • • 60 61 61 61 63 Then, put your data in a stemand-leaf plot. The ordered numbers are: 56, 57, 58, 58, 59, 59, 60, 61, 61, 61, 63 • Each STEM stands for the first digit of each number. • Record the tens digits in order from least to greatest. HEIGHT IN INCHES Stem Leaves 5 6, 7, 8, 8, 9, 9 6 0, 1, 1, 1, 3 The ordered numbers are: 56, 57, 58, 58, 59, 59, 60, 61, 61, 61, 63 HEIGHT IN INCHES Stem Leaves 5 6, 7, 8, 8, 9, 9 6 0, 1, 1, 1, 3 • Each LEAF stands for the second digit of each number. • Record the ones digits in order from least to greatest. You can use a stem-and-leaf plot to find the median and the mode. HEIGHT Stem 5 6 IN INCHES Leaves 6, 7, 8, 8, 9, 9 0, 1, 1, 1, 3 MEDIAN Find the middle number in a set of numbers. MODE Find the number that occurs most often in a set of numbers. The median is 59 inches. The mode is 61 inches. Now, let’s try one on our own! Here are the scores of our volleyball games in a stem-andleaf plot! Volleyball Scores for Our Team Stem Leaves 0 5, 6, 7, 9 1 3, 5, 5, 5, 6 How many volleyball games were played? Stem Leaves 0 5, 6, 7, 9 1 3, 5, 5, 5, 6 9 What are the scores? Stem Leaves 0 5, 6, 7, 9 1 3, 5, 5, 5, 6 5, 6, 7, 9, 13, 15, 15, 15, 16 What is the median? Stem Leaves 0 5, 6, 7, 9 1 3, 5, 5, 5, 6 13 What is the mode? Stem Leaves 0 5, 6, 7, 9 1 3, 5, 5, 5, 6 15 Congratulations, you are on the way to being a stem-and-leaf expert!!