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Answer the following questions. (a) What is the implication of a correlation matric not being positive-semidefinite? (b) Why...

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Advance Math

Answer the following questions.
(a) What is the implication of a correlation matric not beingpositive-semidefinite?
(b) Why are the diagonal elements of a correlation matrix always1?
(c) Making small changes to a positive-semidefinite matrix with 100variables will have no effect on the matrix. Explain thisstatement?

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