Residuals & Correlation

Front

What is a residual?

Back

The difference between the observed value and the predicted value in a regression analysis.

Front

How do you calculate a residual?

Back

Observed - Predicted

Front

What does a good residual plot indicate?

Back

It indicates that the model fits the data well.

Front

What should a residual plot look like if the model is appropriate?

Back

Random scatter without distinct patterns.

Front

What does a distinct pattern in a residual plot suggest?

Back

It suggests that the model may not be appropriate for the data.

Front

What is the purpose of analyzing residuals?

Back

To assess the fit of a regression model.

Front

What does a positive residual indicate?

Back

The observed value is greater than the predicted value.

Front

What does a negative residual indicate?

Back

The observed value is less than the predicted value.

Front

In a residual plot, what does a random distribution of points suggest?

Back

It suggests that the linear model is a good fit for the data.

Front

What is the significance of the number of positive residuals in a residual plot?

Back

It indicates how many observed values are above the predicted values.