Intro to Linear Regression (AFDA)

Front

What is Linear Regression?

Back

A statistical method used to model the relationship between a dependent variable and one or more independent variables.

Front

What does the correlation coefficient (r) indicate?

Back

It measures the strength and direction of a linear relationship between two variables.

Front

What is the range of the correlation coefficient (r)?

Back

The range of r is from -1 to 1.

Front

What does an r value close to 1 indicate?

Back

A strong positive linear relationship between the variables.

Front

What does an r value close to -1 indicate?

Back

A strong negative linear relationship between the variables.

Front

What does an r value close to 0 indicate?

Back

Little to no linear relationship between the variables.

Front

What is an outlier in a scatterplot?

Back

A data point that differs significantly from other observations.

Front

How can you identify outliers in a scatterplot?

Back

By looking for points that fall far away from the general trend of the data.

Front

What is a scatterplot?

Back

A graphical representation of two variables' values plotted along two axes.

Front

What does a strong negative correlation look like in a scatterplot?

Back

As one variable increases, the other variable tends to decrease.