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You have 3 random variables X, Y, and Z, with corr(X,Y) = 0.70 and corr(X,Z) = 0.80. What is the minimum value for corr(Y,Z)? Can this correlation be negative? For some hint or to check out our previous challenge of the week, visit http://bit.ly/RlfJtq You may leave the list at any time by sending the command SIGNOFF allstat to [log in to unmask], leaving the subject line blank.