01/11/11
Stem-and-Leaf
Warm Up
Use the graph for problems 1-3
1. How many students
say oranges are their favorite?
40
2. What is the least popular fruit?
kiwi
3. How many students answered
the survey?
90
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
Learning Target: I will read and
create a stem-and-leaf plots.
01/11/11
Stem-and-Leaf
Turn in worksheets
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
Learning Target: I will read and
create a stem-and-leaf plots.
01/11/11
Stem-and-Leaf
Have you seen stem-and-leaf plots before?
How do you read the numbers?
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
2
4 7 9
3
0 6
Learning Target: I will read and
create a stem-and-leaf plots.
Frequency Tables and
1-3 Stem-and-Leaf Plots
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.
Stems
2
3
Leaves
4 7 9
0 6
Key: 2|7 means 27
Course 2
01/11/11
Stem-and-Leaf
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)
2 5 = 25
Leaf = last digit
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
Learning Target: I will read and
create a stem-and-leaf plots.
01/11/11
Stem-and-Leaf
List the data values of the stem-and-leaf plot.
1 25
Key: 1 2 means 12
4 011
5 279
The data values are:
12, 15, 40, 41, 41, 52, 57, and 59.
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
Learning Target: I will read and
create a stem-and-leaf plots.
01/11/11
Stem-and-Leaf
List the data values of the stem-and-leaf plot.
2 36
Key: 2 3 means 23
3 789
4 256
The data values are:
23, 26, 37, 38, 39, 42, 45, and 46.
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
Learning Target: I will read and
create a stem-and-leaf plots.
01/11/11
Stem-and-Leaf
Use the given data to make a stem-and-leaf plot.
4 235
5 0
6 14
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
Key: 4 2 means 42 mi/h
Speeds range from
42 to 64 so stems
are 4 to 6.
Learning Target: I will read and
create a stem-and-leaf plots.
Frequency Tables and
1-3 Stem-and-Leaf Plots
Additional Example 2:
Organizing Data in a Stem-and-Leaf Plot
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
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
Frequency Tables and
1-3 Stem-and-Leaf Plots
Additional Example 2 Continued
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
Step 2: List the stems from least to greatest on the plot.
The stems
are the
tens digits.
Course 2
Stems
1
2
3
4
Leaves
Frequency Tables and
1-3 Stem-and-Leaf Plots
Additional Example 2 Continued
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
Step 3: List the leaves for each stem from least to greatest.
The stems
are the
tens digits.
Course 2
Stems
1
2
3
4
Leaves
2 5 5 7 7 8
0 1 23 3 9
3 3
0
The leaves
are the
ones digits.
Frequency Tables and
1-3 Stem-and-Leaf Plots
Additional Example 2 Continued
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
Step 4: Add a key and a title.
The stems
are the
tens digits.
Number of Years Coached
Stems
1
2
3
4
Key: 2 | 1 means 21.
Course 2
Leaves
2 5 5 7 7 8
0 1 23 3 9
3 3
0
The leaves
are the
ones digits.
01/11/11
Stem-and-Leaf
Assignment
Page16 #2, 4,5,6,9,11
Today’s Plan:
-Warm-Up
-Lesson
-Assignment
Learning Target: I will read and
create a stem-and-leaf plots.