Scatterplots and correlation coefficient

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What does no correlation mean?

Back

No correlation means there is no apparent relationship between the two variables; changes in one do not affect the other.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does an r value close to 1 indicate?

Back

An r value close to 1 indicates a strong positive correlation between the two variables.

Front

What does an r value close to -1 indicate?

Back

An r value close to -1 indicates a strong negative correlation between the two variables.

Front

What does an r value close to 0 indicate?

Back

An r value close to 0 indicates little to no correlation between the two variables.

Front

How can you identify a positive correlation in a scatterplot?

Back

In a scatterplot, a positive correlation is identified by points that trend upwards from left to right.

Front

How can you identify a negative correlation in a scatterplot?

Back

In a scatterplot, a negative correlation is identified by points that trend downwards from left to right.