I Areas under the normal curve Dealing with negative z's Note- because the normal curve is symmetric, the amount of area between the mean and z=-1.10 is the same as the amount of area between the mean and z=+1.10 C 2002 The Wadsworth GroupAreas under the Normal Curve - Dealing with Negative Z’s • Note - Because the normal curve is symmetric, the amount of area between the mean and z = –1.10 is the same as the amount of area between the mean and z = +1.10. © 2002 The Wadsworth Group