Department of Mathematics
Statistics
Random Sampling

Random Sampling:

                To make valid nontrivial generalizations from samples of a population.
             samples must be obtained by a scheme to insure:

            1. Relevant Characteristics: Sample must bear a know relationship to the
                            corresponding characteristics of the population
 
            2. Generalizations may be drawn from samples in accordance with
                            given "book of rules" whose validity rest on the
                            Mathematical theory of probability

                    For a sample to meet the above criteria, it must be obtained through
                    some type of random selection

Randomness:

                That property that  requires each individual in a population having
             an equal chance of being selected

              In practice random sampling is a difficult task