Which of the following best illustrates what is meant by validating the sample?
A) buying samples only from a well-known and respected sampling firm
B) using samples that have, in the past, provided reliable and valid results
C) comparing the sample's profile with a known profile such as the census
D) confirming the manager's approval
E) There is no way to "validate" a sample. This is why probability sampling methods are so important.
Answer: b. Using samples that have, in the past, provided reliable and valid results