what variables are in conditional assumptions what conditional expectation is variance how to work with conditional expectations and variances how do you work with conditional expectations can conditional expectations be used in variance test why use conditional expectations and variance if x,z,x is a random variable what is the variance of why are i having to use conditional expectations and variances in the equation can you work on conditional expectations with a variance of x? if the variable z is a random variable, then the formula e[y-f(x)+e2[(y-f(x)] is the same as e[y-f(x)] in an equation? when to use conditional expectations when to use variable what is conditional expectation for variance conditional expectations and variances conditional expectations and variances definition in math which variable should r be a random variable why would conditional expectations be called variances why is conditional expectation an appropriate variance if x is a normal variable, can the variable x be a value which statement is appropriate for using conditional expectations and variances? when to use conditions and variances?