Correlation and Scatterplots

Front

What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together. It can be positive, negative, or zero.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

Front

What does a correlation coefficient (r) of 1 indicate?

Back

A correlation coefficient of 1 indicates a perfect positive correlation between two variables.

Front

What does a correlation coefficient (r) of -1 indicate?

Back

A correlation coefficient of -1 indicates a perfect negative correlation between two variables.

Front

What does a correlation coefficient (r) of 0 indicate?

Back

A correlation coefficient of 0 indicates no correlation between two variables.

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for two variables for a set of data, showing the relationship between them.

Front

How do you interpret a scatterplot with a positive slope?

Back

A scatterplot with a positive slope indicates a positive correlation, meaning as one variable increases, the other variable also increases.

Front

How do you interpret a scatterplot with a negative slope?

Back

A scatterplot with a negative slope indicates a negative correlation, meaning as one variable increases, the other variable decreases.

Front

What does it mean if a scatterplot shows no clear pattern?

Back

If a scatterplot shows no clear pattern, it suggests that there is no correlation between the two variables.