01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.

Warm Up

1. How many students say oranges are their favorite?

2. What is the least popular fruit?

3. How many students answered the survey?

40

kiwi

90

Use the graph for problems 1-3

01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.

Turn in worksheets

01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.

Have you seen stem-and-leaf plots before?

How do you read the numbers?

2 4 7 9

3 0 6

A stem-and-leaf plot can be used to show how often data values occur and how they are distributed. Each leaf on the plot represents the right-hand digit in a data value, and each stem represents left-hand digits.

2 4 7 9

3 0 6

Stems Leaves

Key: 2|7 means 27

Course 2

1-3 Frequency Tables and Stem-and-Leaf Plots

A stem-and-leaf plot is another way to display data. The values are grouped so that all but the last digit is the same in each category.

Stem = first digits(s)

Leaf = last digit

2 5 = 25

01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.

List the data values of the stem-and-leaf plot.

1 2 5

4 0 1 1

5 2 7 9

Key: 1 2 means 12

The data values are:

12, 15, 40, 41, 41, 52, 57, and 59.

01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.

List the data values of the stem-and-leaf plot.

2 3 6

3 7 8 9

4 2 5 6

Key: 2 3 means 23

The data values are:

23, 26, 37, 38, 39, 42, 45, and 46.

01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.

Use the given data to make a stem-and-leaf plot.

4 2 3 5

5 0

6 1 4

Key: 4 2 means 42 mi/hSpeeds range from 42 to 64 so stems are 4 to 6.

01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.

The data shows the number of years coached by the top 15 coaches in the all-time NFL coaching victories. Make a stem-and-leaf plot of the data.

33, 40, 29, 33, 23, 22, 20, 21, 18, 23, 17, 15, 15, 12, 17

Additional Example 2: Organizing Data in a Stem-and-Leaf Plot

Step 1: Find the least data value and the greatest data value.Since the data values range from 12 to 40, use tens digits for the stems and ones digits for the leaves.

Course 2

1-3 Frequency Tables and Stem-and-Leaf Plots

The data shows the number of years coached by the top 15 coaches in the all-time NFL coaching victories. Make a stem-and-leaf plot of the data.

33, 40, 29, 33, 23, 22, 20, 21, 18, 23, 17, 15, 15, 12, 17

Additional Example 2 Continued

Step 2: List the stems from least to greatest on the plot.

Stems Leaves

1

2

3

4

The stems are the tens digits.

Course 2

1-3 Frequency Tables and Stem-and-Leaf Plots

The data shows the number of years coached by the top 15 coaches in the all-time NFL coaching victories. Make a stem-and-leaf plot of the data.

33, 40, 29, 33, 23, 22, 20, 21, 18, 23, 17, 15, 15, 12, 17

Additional Example 2 Continued

Step 3: List the leaves for each stem from least to greatest.

Stems Leaves

1

2

3

4

The stems are the tens digits.

2 5 5 7 7 8

0 1 2 3 3 93 3

0

The leaves are the ones digits.

Course 2

1-3 Frequency Tables and Stem-and-Leaf Plots

The data shows the number of years coached by the top 15 coaches in the all-time NFL coaching victories. Make a stem-and-leaf plot of the data.

33, 40, 29, 33, 23, 22, 20, 21, 18, 23, 17, 15, 15, 12, 17

Additional Example 2 Continued

Step 4: Add a key and a title.

The stems are the tens digits.

Stems Leaves

1

2

3

4

2 5 5 7 7 8

0 1 2 3 3 93 3

0

The leaves are the ones digits.

Number of Years Coached

Key: 2 | 1 means 21.

Course 2

1-3 Frequency Tables and Stem-and-Leaf Plots

Assignment

Page16 #2, 4,5,6,9,11

01/11/11 Stem-and-Leaf

Today’s Plan:-Warm-Up-Lesson-Assignment

Learning Target: I will read and create a stem-and-leaf plots.