3<span>. </span>Populations<span> and </span>samples<span> ... Although a statistician should clearly </span>define<span> the </span>population<span> he or she is dealing with, they may not be able to enumerate it exactly. For instance, in ordinary ... For taking a</span>sample<span> from a long </span>list<span> a compromise between strict theory and practicalities is known as a systematic random </span>sample<span>.</span>
