Properly Conducted Samples Can Be Used to Make Inferences or Generalizations

Properly conducted samples can be used to make inferences or generalizations about the entire population. The following four principles should guide sampling design:

A) A sampling technique should be used in which the probability for selecting any unit in the population can be calculated.
B) A sample should be drawn that is of appropriate size relative to the size of the population to which generalization is desired. And always test samples to ensure that they are truly representative of the population to which the evaluators hope to generalize on variables of critical interest.
C) All of the above.
D) None of the above.