Explore the Residuals of a Data Set Guidance for Casio fx-9750GIII

Describe the residual data set:

$a$	$1$	$2$	$3$	$4$	$5$
$b - f (a)$	$- 9$	$- 2$	$2$	$4$	$5$

Step 1

Select STAT or click 2 from the main menu to enter the data.

Step 2

Enter the data in List 1 and List 2.

Step 3

Click GRPH F1 to see the scatter plot.

Step 4

Verify the graph of the residuals.

Step 5

Add the rest of the points in the table.

$a$

$1, 2, 3, 3, 4, 5, 5, 6, 6, 7, 7, 8, 8.5, 9$

$b - f (a)$

$- 9, - 2, 2, 4, 5, 3, 5, 2, - 5, - 2.5, 2, 5, - 4, - 5$

Step 6

Click GRPH F1 to see the enlarged scatter plot.

What patterns can you identify in the following residual plots that might indicate that the regression line is not a good model for the data? Based on the residual plot, are there any points that may be considered outliers?