Unformatted text preview: you will have to do a PCA for this. Notice that the data have been standardised to unit SD, so this is doing the analysis on a correlation matrix. Compare the two plots. Comment on what you see. 4) What proportion of the total variation is preserved by the PCO reduced space plot? Use an appropriate measure. 5) Present the PA correlations for the first 2 PAs. Interpret them. Compare them with the PC component correlations. Comment on the comparison. 6) Plot a couple of internal variables as bubble plots. Interpret what you see. 7) Perform a non-metric multidimensional scaling, for a number of dimensions and plot a STRESS diagram. How adequate is the 2 dimensional plot? What might be a more appropriate number of dimensions? 8) Plot the group variable into the reduced space plot from the non-metric MDS. Compare with the same plots from the PCO and the PCA. Comment on what you see....
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- Spring '09
- Cartesian Coordinate System, space plot, unit standard deviation