Data and Dot Plots
Dot plots display data by placing a dot above a number line for each data value, making it easy to see patterns and compare frequencies.
What You Need to Know
Key Concept Diagram
A dot plot uses dots on a number line to show how often each value occurs
Each dot represents one data value (or one person/observation)
Dot plots make it easy to spot the most common value (mode) and the spread of data
Data can be collected through surveys, experiments, or observation and then displayed in a dot plot
Key Vocabulary
Dot plot
A graph that shows data as dots above a number line, one dot per data value
Mode
The value that appears most often in a data set
Frequency
How many times a particular value occurs in a data set
Data
A collection of information, often numbers, gathered for analysis
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
In a dot plot, what does each dot represent?
Question 2
A dot plot shows these numbers of siblings students have: 0,0,1,1,1,2,2,3. What is the mode?
Question 3
Why are dot plots useful for displaying data?
Key Concepts Summary
- ●A dot plot uses dots on a number line to show how often each value occurs
- ●Each dot represents one data value (or one person/observation)
- ●Dot plots make it easy to spot the most common value (mode) and the spread of data
- ●Data can be collected through surveys, experiments, or observation and then displayed in a dot plot