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Stem-and-Leaf Plots. How to Read Them and Construct Them.

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### Stem-and-Leaf Plots

How to Read Them and Construct Them

A stem-and-Leaf Plot The data is arranged by place value. The digits in the largest place is referred to as the stem and the digits in the smallest place are referred to as the leaf (leaves). The leaves are always displayed to the right of the stem. They are usually used when there are large amounts of numbers to analyze, such as series of scores in sports

Stem

Leaf

0

0 0 4 6 6 7 9 9

1

0 1 2 3 4 5 8 9

2

1 2 3 6

3

5

1|3 = 13 hours

Stem-and-Leaf Plot

In this case, the stem is the tens digit of the numbers and the leaf is

the ones digit.

Leaf

0

0 0 4 6 6 7 9 9

1

0 1 2 3 4 5 8 9

2

1 2 3 6

3

5

1|3 = 13 hours

Example: The stem and leaf plot below represent the following set

of numbers:

0,0,4,6,6,7,9,9,10,11,12,13,14,15,18,19,21,22,23,26,35

In this case, the stem is the tens digit of the numbers and the leaf is

the ones digit.

Example 5-2b

Answer:

Stem

Leaf

5

8

Test Scores

6

82 94 75 85 88 90

93 80 58 77 86 92

81 85 94 79 86 93

87 93 96 80 82 76

7

5 6 7 9

8

0 0 1 2 2 5 5 6 6 7

9

0 2 3 3 3 4 4 6

7|5 = 75 points

Example 2 TEST SCORESThe table below shows the test scores earned by a class of middle school math students on a chapter test. Make a stem-and-leaf plot of the data. Then use it to describe how the data are spread out.

Example 3 You Try

Number of Books

Key: 1 | 1 means 11

The number of books each student has at home is recorded. Make a stem-and-leaf plot of the data.

Number of Books

38 46 16 28 31 12 27 32 49 33 12 38 34 48 22 36 29 47 41 24

30 21 17 40 13 32 15 31 21 13 16 43 33 30 25 28 29 13 11 49

Answer

below are links to watch movies that show you more about Stem-and-leaf Plots

- http://www.mathplayground.com/howto_stemleaf.html
- http://glencoe.mcgraw-hill.com/sites/0078804833/student_view0/chapter8/lesson3/personal_tutor.html
- http://videos.howstuffworks.com/hsw/22957-discovering-math-stem-and-leaf-plots-video.htm
- http://olc.spsd.sk.ca/de/MathExtensions/datamgmt/teachers/orgdis/stmleaf.swf
- http://www.youtube.com/watch?v=CfFcQAaOg0I

Below are the links of interactive activities which help you to create your own stem-and-leaf plot

- http://www.learner.org/courses/learningmath/data/swfs/3a_stem.swf
- http://www.learner.org/courses/learningmath/data/swfs/3a_order.swf

Test your skills on stem-and-leaf plots

http://glencoe.mcgraw-hill.com/sites/0078804833/student_view0/chapter8/lesson3/self-check_quizzes.html

http://www.beaconlearningcenter.com/documents/1600_01.pdf

http://www.mytestbook.com/worksheet.aspx?topics=Stem%20Leaf%20Chart&subject=Math&grade=5&test_id=235

http://glencoe.mcgraw-hill.com/sites/0078804906/student_view0/chapter11/lesson7/self-check_quizzes.html

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