You are using the following procedure to simulate a random variable
Y: Generate 3 uniform random variables
U_(1),U_(2),U_(3)∼Unlform(0,1). For
i=1,2,3, set
x_(i)=-2ln(1-U_(i)). Set
Y=min(x_(1),x_(2),x_(3)). Calculate the variance of the resulting random variable
Y.