Im stuck with the following -
(Xn-1 + Xn)/2;
(1/4)X1 + (3/4)X2;
(X1 + X2 + ……… + Xn)/(n – 1)
I need to derive expressions for the expected values and variances of the (three) above estimators of mx.
Any help greatly appreciated.
X is a continuous random variable, and n is the sample size taken from the population.
It is trying to derive the mean and variance, i have to state which is the best and worst estimator out of the 3 given.
That is all the information in the question im afriad.