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Which of the following implies no relationship with respect to correlation?

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Which of the following implies no relationship with respect to correlation?

(a) Cor(X, Y) = 1

(b) Cor(X, Y) = 0

(c) Cor(X, Y) = 2

(d) All of the mentioned

This question was addressed to me in quiz.

I would like to ask this question from Introduction to Regression Models topic in chapter Statistical Inference and Regression Models of Data Science

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Right option is (b) Cor(X, Y) = 0

Easy explanation - Correlation is a statistical technique that can show whether and how strongly pairs of variables are related.

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