
Residual plot
hey guys, just working on residuals. first post and hopefully not the last :P
so here the question much appriciation to however so helps :)
note im finding it extremely hard to intrepret which is of random scatter and which is of a pattern.
which of the following residual plots shows that a linear model (the model used in the first place) is inappropriate to use to display the correlation between the two variables.
A)http://www.studyit.org.nz/phpBB2/download.php?id=6140
or
B) http://www.studyit.org.nz/phpBB2/download.php?id=6141
by the way hello http://mathguru.freeforums.org/image...on_e_smile.gif gd forums

The second residual plot has too many positive values to justitfy the regression suggested.
For the regression model to be stable the sum of residuals

hey thanks pickslides,
just wondering though, in A can we state that there is no observable trend with the residuals? because it sort of seems like its got a decreasing trend, however the trend being extremely vague

You cannot determine an increasing or decreasing trend from a residual plot.
You are correct in saying the correlation is weak given the magnitude of each residual.