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2.9 Which of the following matrices call he uscd in a ',-dimensional linear transf.orrnat~on
preserving the Mahalanobis distance relations?

Explain why

2.10 Determine the orthonormal translormation for thc data represented in Figure 2.1 I in thc
y plane.

2.11 Consider the Tissue dataset. Determine, for each pattern class, which feature
dislributions can be reasonably described by thc normal model.

2.12 Consider the CTG dntaset. Perform Kruskal-Wallis tests for all the features and sort
them by decreasing discriminative capacity (ten classes). Using the rank values of the
tests and box plots determine the contributions for class discrimination of the best lhree
features.