SPSS regression residuals - unstandardized; standardized; studentized Video Lecture | SPSS: For Beginners - Data & Analytics

[Music]
hi everyone this video goes along with
the presentation I did on outliers in
regression so how do you plot residuals
versus predicted why and residual versus
explanatory variables in SPSS first
let's look at the types of residuals
shouldn't get in spss for linear
regression we talked about two in that
previous video what called the
standardized and the studentized what we
call a standardized is what I specialist
calls the studentized we called
studentized is what they call
studentized deleted these two are the
best for outlier detection a lot of
students on the courses used this SPSS
called the standardized now it says here
it's got a standard deviation of 1
that's not actually true it's got a
standard deviation approximately okay so
a student eyes and the student eyes
deleted what they call the better ones
to use let's say I'm going to get the
residual plots okay first we fit the
regression so we'll go to analyze
regression linear and then take the
deep-end verbal in the dependent box and
the two axes i've got here and we'll put
them into the independent box then i'm
going to click on plots right you can
see they have got a y axis and an x axis
this is different from deep and verbal
explanatory variable y it just means the
vertical axis x stands for the
horizontal axis so always want to put
the residual on the vertical axis here
the residuals on the left panel and the
code have already gone through in the
previous slide
you
we want our student ID deleted for
outlier analysis and we'll have the
standardized Y predicted Y on the x axis
if I wanted to have more than one
scatterplot I can click Next and you can
just repeat say we're done then we just
click continue and ok
for this box there you can only plot the
residual versus predicted wise not the
exit
let's show you how to plot the residual
versus the X's I go back to the
regression box I'm gonna have to save
the residuals this time you see that I
can save all five types of residuals
we'll just pick one of them could pick
more than one we'll go for the under
standardized either war ones and let's
say we want to plot the log residuals
versus the X let's save it first
continue okay
right and then let's look at our date of
you you can see now I have an additional
column that's the raw residuals can go
into graphs and charts get the residual
versus the X choose the scatter plot
option which is in the left panel
scatter and then
yep select the simple scatter and K so
just dragging what I want so drag the
residuals to the vertical axis and
either of the X's on to the horizontal
axis and then I'm done really I just
click OK do this one if you want to look
for nonlinearities or see if the parents
are proportional to the X's
that's your simple basic residual words
you