The residual points include the difference between the value in Irwin's dataset and the predicted values
<h3>How to plot the residuals?</h3>The residual is calculated using:
Residual = Actual points - Predicted points
The actual points are:
(1,43), (3, 36), (5,22), (6, 25), (8,14)
The predicted points are:
(1,44), (3, 35), (5,26), (6, 22), (8,13)
Using the residual formula above, we have the residuals to be:
(x,y) = (1,-1), (3, 1), (5,-4), (6, 3), (8,1)
See attachment for the residual plot
Read more about residuals at:
₇P₅ is a permutation. you can find this setting in the statistics menu of your scientific calculator (i think).
If you don't have a scientific calculator, you can use the following formula:
nPr =
₇P₅ =
=
=
= 7 * 6 * 5 * 4 * 3
= 2520
Answer: C