Student Worksheet — Session 4: Organizing Numerical Data

Data Science for Young Minds · Grade 4 · Ages 9–10

Name

Date

Class Period

Part 1 — Vocabulary

Line plot / dot plot

Stem-and-leaf plot

Range

Cluster

Spread

Minimum / Maximum

Part 2 — Build the Line Plot

Data set — 20 quiz scores:

72, 85, 91, 68, 74, 85, 90, 63, 77, 85, 92, 74, 88, 65, 71, 80, 85, 77, 93, 68

Draw an X above the number line for each score. Stack Xs when the same score appears more than once.

← Place X marks above each score value →

606264666870727476788082848688909294

Quiz Scores

Minimum score:

Maximum score:

Range (max − min):

Where is the cluster? (circle one) 60s 70s 80s 90s

What does the cluster tell you about how the class performed?

Part 3 — Build the Stem-and-Leaf Plot (with a partner)

Use the same 20 scores. First order them from smallest to largest, then fill in the leaves.

Step 1 — Write all scores in order:

Step 2 — Fill in the stem-and-leaf plot:

Stem | Leaves
6| 
7| 
8| 
9| 
Key:   |   =  

Which stem row has the most leaves?

How many leaves does it have?

What score appears most often? (the mode)

Part 4 — Compare and Think About It

What can you see in the stem-and-leaf that is harder to see in the line plot?

What can you see in the line plot that is harder to see in the stem-and-leaf?

Write one claim about the quiz scores using evidence from your plots:

"The quiz scores show because the data shows ."

Take-Home Challenge — Make Your Own Line Plot!

Ask 10 people (family, neighbors, anyone!) one numerical question. Examples: "How many hours did you sleep last night?" or "How many books did you read this month?"

Write your question:

Collect 10 responses and draw a line plot of the data

Find: minimum = maximum = range =

Write one observation about the cluster or spread