Use the rock dataset in RO Load the data(rock) The dataset has the fo.pdf

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Use the rock dataset in RO Load the data(rock) The dataset has the following variables: area area of pores space, in pixels out of 256 by 256 peri perimeter in pixels shape perimeter/sqrt(area) perm permeability in milli-Darcies Tasks: 1. Describe the dataset (5pts) 2. Scale the dataset. Was it necessary? Why? (5pts) 3. Perform PCA on the scaled dataset (use the princomp function). How many components should you keep? Explain. (5pts) 4. Describe the loadings (5pts) 5. Plot (biplot) the pairs of important components (5pts).

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