For a set population, does a parameter ever change?

(A) never

(B) always

(C) sometimes

(D) unknown

If there are three different samples of the same size from a set population, is it possible to get three different values for the same statistic?

(A) Data from samples may vary from sample to sample, and so corresponding sample statistics never vary from sample to sample.

(B) Data from samples may vary from sample to sample, and so corresponding sample statistics may vary from sample to sample.

(C) Data from samples never vary from sample to sample, and so corresponding sample statistics never vary from sample to sample.

(D) Data from samples never vary from sample to sample, and so corresponding sample statistics may vary from sample to sample.