Wicomico County Mathematics Content Standards

•4.5.1 Gather relevant data and compare data sets to answer a question.

•4.5.2 Organize and display data using stem and leaf diagrams

•4.5.3 Analyze and interpret stem-and-leaf diagrams

Warm-UpShow this data on a stem-and-

leaf diagram.

20 25 28 32 20 26

33 26 19 32 28 20

Time Spent on Carving Pumpkins

Time Spent on Carving Pumpkins

1

2

3

9

0 0 0 5 6 6 8 8

2 2 3

Math Journal

Write instructions for a fifth grader to follow to make a stem-and-leaf

diagram.

Make a stem-and-leaf diagram to show the

data on ghost presidents.

President Age

President Age

Casper 57

Carrigan 61

Harvey 57

Stretch 57

Fatso 58

Stinky 57

Dransfield 61

Arp 54

Yotta 68

Yada 51

Ziggy 49

Pixo 64

Zatso 50

Trapezo 48

Wildbrain 65

Zilch 52

Sworl 56

Beenz 46

Flooz 54

Abracat 49

Scoring Rubric for the Stem-and-Leaf Diagram

2 POINTS

•All information is accurately included.

•Plot is titled.

•The plot is neat, well-organized, and attractive.

•Leaves are ordered from smallest to largest.

•Stems and leaves are accurately displayed.

1 POINT

•At least 3 of the above criteria have been met.

O POINTS

•Less than 3 of the above criteria have been met.

What conclusions can you draw from your diagram?

Would a line plot be a sensible way to show

this data?

Explain

How are line plots and stem-and-leaf diagrams

alike?How are they different?

•The back-to-back stem-and-leaf diagram shows the average daily October temperatures for Spooky City and Candy Corn Village. Use the plot to compare the pattern of October temperatures in the two cities.

Spooky City Candy Corn Village

7

6

5

4

3

1

0 0 0 1 1 1 1 2 3 3 4 5

2 5 5 5 6 6 6 7 8 9 9

2 2 3 4 4 5

2 2

9 8 7 7 7 5 3 3 1 1 1 0

8 8 8 7 4 4 2 2 0 0

6 6 4 3 3 0

•What do the digits in the stem represent?

•Which leaves, on the right or the left, show temperatures for each city?

Spooky City ___Candy Corn Village ___

•The lowest temperature for Spooky City was ___. The highest temperature was ___. For Candy Corn Village, the lowest temperature was ___ and the highest temperature was ___.

How many more days was the temperature in

the 60’s and 70’s in Candy Corn Village

than in Spooky City?

Writing About Math

Write 2 or 3 sentences comparing the

temperature patterns for the two cities.

How can you compare the

pattern without comparing the

actual temperatures?

Homework

Write a paragraph or more about stem and leaf

diagrams and line plots. Use the notes that you took

in class today.