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155.60 7476.45 303.62 I = S = 14.70 303.62 26.19 (a) Determine the sample principal components and their variances for these data. (You may need

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155.60 7476.45 303.62 I = S = 14.70 303.62 26.19 (a) Determine the sample principal components and their variances for these data. (You may need the quadratic formula to solve for the eigenvalues of S.) (b) Find the proportion of the total sample variance explained by y

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