In Order to Generalize from the Results Obtained with a Sample

Multiple Choice

In order to generalize from the results obtained with a sample to the population as a whole,

A) all members of the population must be tested eventually
B) each member of the population must have exactly the same probability of being selected, especially if stratified sampling is being used
C) the sample must be representative of the population
D) the exact values (on the trait being measured) for the population must be known