0
1
Z is a variable with mean 0 and variance 1.Z is a variable with mean 0 and variance 1.Z is a variable with mean 0 and variance 1.Z is a variable with mean 0 and variance 1.
x(x + 1)(x -1)
Maybe your speaking a variable that contains a ternary operators such as:$variable = (1 == 1) ? 'value-if-true' : 'value-if-false';
If x = 1 then X is not really a random variable but a constant.