Main content
Course: Statistics and probability > Unit 5
Lesson 1: Introduction to scatterplots- Constructing scatter plots
- Making appropriate scatter plots
- Positive and negative linear associations from scatter plots
- Describing trends in scatter plots
- Positive and negative associations in scatterplots
- Outliers in scatter plots
- Clusters in scatter plots
- Describing scatterplots (form, direction, strength, outliers)
- Scatterplots and correlation review
© 2024 Khan AcademyTerms of usePrivacy PolicyCookie Notice
Scatterplots and correlation review
A scatterplot is a type of data display that shows the relationship between two numerical variables. Each member of the dataset gets plotted as a point whose x-y coordinates relates to its values for the two variables.
What is a scatterplot?
A scatterplot is a type of data display that shows the relationship between two numerical variables. Each member of the dataset gets plotted as a point whose coordinates relates to its values for the two variables.
For example, here is a scatterplot that shows the shoe sizes and quiz scores for students in a class:
Each data point is a student whose -coordinate gives their shoe size and -coordinate gives their quiz score.
Want to learn more about constructing scatterplots? Check out this video.
What is correlation?
We often see patterns or relationships in scatterplots.
When the variable tends to increase as the variable increases, we say there is a positive correlation between the variables.
When the variable tends to decrease as the variable increases, we say there is a negative correlation between the variables.
When there is no clear relationship between the two variables, we say there is no correlation between the two variables.
Want to learn more about types of correlation? Check out this video.
Practice
Want to practice more problems like these? Check out this exercise on positive and negative correlations.
Want to join the conversation?
No posts yet.