Scatter Plots Correlation Coefficient Residuals

What should a residual plot look like?

• Distinct Pattern
• Curve
• Random

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

• A
• B
• C

Shown is a residual plot. How many positive residuals are there?

• 5

• 1

• 3

• 9

Shown is a residual plot. How many negative residuals are there?

• 5

• 1

• 3

• 9

What is the correlation?

• Negative correlation

• No correlation

• Positive correlation

Shown is a residual plot. How many zero residuals are there?

• 5

• 1

• 3

• 0

How do you calculate a residual?

• Actual - Predicted

• Predicted - Actual

• This residual plot indicates a good model.

• This residual plot indicates a poor model.

A negative residual means...

• that the predicted value is too big
• that the predicted value is too small
• that the x value is too big
• that the x value is too small

A positive residual means...

• that the predicted value is too big
• that the predicted value is too small
• that the x value is too big
• that the x value is too small