Which of the Following Statements Are True?
A) a Point $\theta$

Which of the following statements are true?

A) A point estimate of a population parameter $\theta$
Is a single number that can be regarded as a sensible value of $\theta$
)
B) A point estimate of a population parameter $\theta$
Is obtained by selecting a suitable statistic and computing its value from the given sample data. The selected statistic is called the point estimator of $\theta$
)
C) The sample mean $\bar { X }$
Is a point estimator of the population mean $\mu$
)
D) The sample variance $S ^ { 2 }$
Is a point estimator of the population variance $\sigma ^ { 2 }$
)
E) All of the above statements are true.