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In this chapter we consider sampling from a well defined finite population when sample is an
appreciable proportion of the population. A typical objective is the estimation of the mean,
or the total, of some quantity over the population. If we know something about all the items
in the population then we can use this information to set up more efficient random sampling
schemes than simple random sampling. A case study of an asset management plan for a water
company illustrates the ideas.
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