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, ranging from -1 to 1.

Front

What does a correlation coefficient of r = 0 indicate?

Back

No linear relationship between the variables.

Front

What does a positive correlation coefficient indicate?

Back

As one variable increases, the other variable also tends to increase.

Front

What does a negative correlation coefficient indicate?

Back

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

Front

What is an outlier in a scatterplot?

Back

A data point that differs significantly from other observations, potentially indicating variability in the measurement or a different underlying process.

Front

How can you identify an outlier in a scatterplot?

Back

Look for points that are far away from the general cluster of data points.

Front

What is the range of possible values for the correlation coefficient?

Back

From -1 to 1.

Front

What does r = 1 indicate?

Back

A perfect positive linear relationship between two variables.

Front

What does r = -1 indicate?

Back

A perfect negative linear relationship between two variables.