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----- Original Message ----- From: "Paul Wicks" <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, August 04, 2004 9:03 PM Subject: Probability Question I have trouble with the initial conditions here. Each of these two Normal distributions must go to infinity in both tails. So at any value on the line the density for each group is greater than zero. So they can't be disjoint.