5 notice the correlations matrix at the top of the

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5. Notice the “Correlations” matrix at the top of the window.  Although it is small (2 x  2), it is representative of all correlation matrices no matter what their size.  On the  left to right diagonal are the values 1.00.  Notice that these occur when the variable  names on the row and column are the same.   Because of this, this is the correlation  of each variable with itself.  Not surprisingly, it is a perfect  = 1.00. 6. In contrast, all of the other off-diagonal numbers are the correlations between  different variables.  Because we only have two variables, there is only one such  correlation.  If you are wondering why it is in the matrix twice, that just reflects 
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that the correlation between Length and Recall is the same as that between Recall  and Length. 7. Click on the  Red Diamond  by “Scatterplot Matrix.”  Move down to the menu item  called  Show Histogram  and select  Horizontal .  If you’re being ornery, you can  select  Vertical , but remember that I hold a grudge. 8. Click on one of the bars on either of the histograms.  See how the observations that  make up bar are highlighted in the other histogram, as darker points in the  scatterplots, and as rows in the Data Table.  Put your cursor on any of the dark  points in the scatterplot.  See how it tells you what row that is in the Data Table.  You can also do that for any of the other dots.  That could be quite useful if we  noticed any observations that struck us as strange or interesting.
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  • Winter '08
  • Signorielli,N
  • Click, ANALYZE menu, RED Diamond, Bivariate Data Length

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