Are Statistical Values Based on a Complete Survey of the Entire

Multiple Choice

Are statistical values based on a complete survey of the entire population or on a sample of it?

A) They are always based on a complete survey because otherwise they would be meaningless.
B) They are always based on a sample since a complete survey is never possible.
C) They are always based on a sample since a complete survey is always a waste of time and energy.
D) Sometimes they are based on a complete survey and sometimes on a sample.
E) There is a general rule that when the population has 95 members or fewer, there must be a complete survey, but for more than 95, a sample must be used.