Scatter Plots & Correlation

Front

What is a scatter plot?

Back

A scatter plot 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 in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

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

Front

What does it mean if there is no correlation in a scatter plot?

Back

No correlation means that there is no discernible relationship between the two variables; changes in one variable do not predict changes in the other.

Front

What is a linear relationship in the context of scatter plots?

Back

A linear relationship is when the data points in a scatter plot can be approximated by a straight line.

Front

What is a 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 of 1 indicate?

Back

An r value of 1 indicates a perfect positive linear correlation between two variables.

Front

What does an r value of -1 indicate?

Back

An r value of -1 indicates a perfect negative linear correlation between two variables.

Front

What does an r value of 0 indicate?

Back

An r value of 0 indicates no correlation between the two variables.

Front

What is a strong positive correlation?

Back

A strong positive correlation means that the data points are closely clustered around a line that slopes upwards.