ABSTRACT
It was brought out in Chapter 1 that sampling is used to arrive at estimates of the characteristics of the populations of interest and that this was done because the cost in money, time, and/or effort to make complete enumerations or evaluations is usually excessive. This implies that such estimates can be made, which, in turn, implies that relationships exist between the populations and the samples drawn from them. Sampling theory is concerned with these interrelationships.
