1) What are the dimensions of this variance-covariance matrix? a) 3x2 b) 3x3 c) 2x3 2) What is the covariance of (Y,Z)? a) 32 b) -4 c) 0 3) What formula(s) do we need for a variance-covariance matrix? a) covariance formula b) variance forfumal c) variance and covariance formulas 4) What are the variances of this variance-covariance matrix? a) (12.5, -15) b) (12.5, 18) c) (-15, -15)

Variance-covariance matrix quiz

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