Which of the Following Statements Are Not Always True?
A) $\theta$

Multiple Choice

Which of the following statements are not always true?

A) It is necessary to know the true value of the parameter $\theta$
To determine whether the estimator $\hat { \theta }$
Is unbiased.
B) When X is a binomial random variable with parameters n and p, the sample proportion $\hat { p } = X / n$
Is an unbiased estimator of p.
C) When choosing among several different estimators of parameter $\theta$
, select one that is unbiased.
D) All of the above statements are not always true.