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How can I solve for question b? (a) The sample covariance for two equally-sized samples is given by: n STY = (ri - x)(yi -

How can I solve for question b?

(a) The sample covariance for two equally-sized samples is given by: n STY = (ri - x)(yi - y) n - 1 i=1 Show that S? = SX + Sy - 25xy. (b) Find the numeric value of Sky

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