Which of the Following Statements Are Correct?
A) the First $\mu$

Which of the following statements are correct?

A) The first population moment is $\mu$
, while the first sample moment is $\bar { X }$
)
B) The moment estimators $\hat { \theta } _ { 1 } , \cdots \cdots , \hat { \theta } _ { m }$
Are obtained by equating the first m sample moments to the corresponding first m population moments, and solving for the unknown parameters $\theta _ { 1 } , \cdots \cdots , \theta _ { m }$
)
C) The method of maximum likelihood was first introduced by R.A. Fisher, a geneticist and statistician, in the 1920's.
D) All of the above statements are true.
E) Only (A) and (B) are true.