ATAR Notes: Forum

VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE General & Further Mathematics => Topic started by: KyngPynn on October 30, 2011, 07:28:08 pm

Title: Residual Plots.
Post by: KyngPynn on October 30, 2011, 07:28:08 pm

Is there an easy way to find out which regression line fits which residual plot?

Title: Re: Residual Plots.
Post by: onur369 on October 30, 2011, 07:29:33 pm

Generally residual plots without any clear pattern represent linear lines. To find which plot is suitable, you can do it through your calculator you can do the manual way or Residual = Actual - Predicted.

Title: Re: Residual Plots.
Post by: KyngPynn on October 30, 2011, 08:43:03 pm

so i gotta do that for like 12 separate data one by one to get an answer...that's gonna take ages in the exam bruh

Title: Re: Residual Plots.
Post by: Natters on October 30, 2011, 08:47:53 pm

yeah but in the exam, A B and C will probs be eliminated by the first one you do bruh
the examiners think of this stuff bruh  :D

Title: Re: Residual Plots.
Post by: MJRomeo81 on October 31, 2011, 12:03:29 am

You can set up a residual plot through the statistics program on the calculator.

 Enter all of your data (ensuring that list 1 is your independent variable, etc.) and then as usual go calc -> linear reg ->. In the pop up menu, where it says residuals, make them appear in list 3. Click Ok and let that generate. Then go to the area where you set your graph, and this time make your Y variable list 3 and leave list 1 as it is (X). Make the graph a scatter plot and then generate it.

The calc will produce a residual plot and you can simply match it. Note this is using the Classpad 330.