Suppose that and are estimations of the parameter theta. We know that E =theta, E =theta/2, v =10 and V =4. Which estimator is \"better\"? In what sense is better? Suppose that and are estimators of theta. We know that E =theta, E theta, V =12, V =10 and E =6.Compare these three estimators. which do you prefer? why? Let three random samples of sizes n1=10,n2=8, and n3=6 be taken from a population with mean mu and variance sigma2. Let and be the sample variances. show that Solution 3 is preferred because it has the least variance V( 3) =6 - [E( 3)]^2 , which is less then 10 or 6..