1. Symmetry. The curve of a normal distribution is symmetric about the ___________ x = . Left and right of axis are ___________
P(μ − x) = P(μ x).
2. Peak. The highest point of the normal curve occurs at the mean value. The probability density ________________ at the center.
3. Probabilities. The areas under the curve, left and right of the mean, are both ½. So, a normal variable has ____________ probabilities of being greater than or smaller than the mean. This property reflects the symmetry of the _____________ curve.