Stem and Leaf Plots

Chapter 5 Lesson 4Stem-and-Leaf

Plots

Luke and Aimee started a dog-walking business in which they walk dogs for people. The number of dogs they walk varies from month to month. In 8 months, they recorded the number of dogs they walked each month. These are shown above.

Number of Dogs

Walked Each

Month

20, 29, 14, 52

34, 45, 30, 48

These numbers can be organized

using a stem-and-leaf plot.

Number of Dogs Walked Each Month

20, 29, 14, 52

34, 45, 30, 48

First, we must put them in numerical order (least to

greatest).

14, 20, 29, 30, 34, 45, 48, 52

Stem Leaf

The TENS digit in each

number

The ONES digit in each

number

1 4

2 0 93 0 44 5 85 2

Key 3|0 = 30

Notice that the stems AND leaves are arranged in

numerical order.

More Stem-and-Leaf Plots

Stem Leaf

0 6 7

1 0 0

2 3 9

3 6 8 9

Ages of Relatives

Note: Numbers less than ten can be displayed. More than one number (10) can be

displayed.

Stem Leaf

1 1 5

2

3 0 4

4 2 2 8

Some stems may have no leaves.Stem-and-Leaf plots still have titles.

Points Scored per Game

Average Weights of the Top 10 Dog Breeds

Rank Breed Weight (lb)

1 Labrador Retrievers 67 2 Golden Retrievers 75 3 German Shepherds 81 4 Dachshunds Standard 27 Miniature 20 5 Beagles 20 6 Yorkshire Terriers 7 7 Poodles Standard 75 Toy 10 8 Boxers 71 9 Chihuahuas 7 10 Shih Tzu 17

Stem Leaf0 7 71 0 72 0 0 73 4 5 6 7 7 1 5 58 1

Stem Leaf0 7 71 0 72 0 0 73 4 5 6 7 7 1 5 58 1

Which stems have the most leaves?

Which stems have no leaves?

Which types of dogs seem to be more popular, large or small?

How many breeds are less than 30 pounds?

How many categories of dogs are shown on the plot?

2 and 7

large

3, 4 and 5

7

12

The End Man to dog trainer: "Every time a bell

rings, my dog goes into the corner." Dog trainer: "That's OK, he is a Boxer."