■ Given observations (X1,...,Xn),an estimator is a random variable of the form 6=g(x),for some function g. Note that since the distribution of X depends on 0,the same is true for the distribution of 6. We use the term estimate to refer to an actual realized value of⑥， Given observations 𝑋 = 𝑋1, … , 𝑋𝑛 , an estimator is a random variable of the form Θ ෡ = 𝑔 𝑋 , for some function 𝑔.  Note that since the distribution of 𝑋 depends on 𝜃, the same is true for the distribution of Θ ෡.  We use the term estimate to refer to an actual realized value of Θ ෡