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Which of these is NOT true about PCA? a . The original data can usually be reconstructed exactly as before from the reduced dimensions b
Which of these is NOT true about PCA?
a
The original data can usually be reconstructed exactly as before from the reduced dimensions
b
It decomposes the data along orthogonal perpendicular axes and keeps the ones with the largest "spread"
c
For Ndimensional data with more than N rows, it can return anything between to N dimensional output
d
It is a technique for dimensionality reduction
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