Calculating Residuals

Front

What is a residual?

Back

A residual is the difference between what really happened and what was expected to happen.

Front

How is a residual defined in relation to data points and lines of fit?

Back

A residual is the vertical distance between a data point and a line of fit.

Front

Back

-50 miles

Front

In a scatter plot, how do you estimate the residual for a book with 15 chapters and 130 pages?

Back

The residual is the vertical distance between the line and the point representing the book.

Front

When a value is above expected, what can be said about its residual?

Back

Its residual is a positive number.

Front

What does a positive residual indicate about a data point?

Back

It indicates that the actual value is above the predicted value.

Front

What does a negative residual indicate about a data point?

Back

It indicates that the actual value is below the predicted value.

Front

How do you calculate a residual?

Back

Residual = Actual Value - Predicted Value.

Front

If the predicted value is 100 and the actual value is 120, what is the residual?

Back

20.

Front

If the predicted value is 50 and the actual value is 30, what is the residual?

Back

-20.