The Indirect Calculation Of Sample Size By Using Unequal-probability Sampling To The Selected Group Unit

This paper discusses the questions of how to apply the designing efficient on indirect calculation of sample size in the single-stage cluster sampling and two-stage sampling of unequal-probability sampling.These include: the estimation of the designing efficient mentioned;the variance of population estimated;the sample size in accordance with the requirements of precision when sampling the sample group by simple random sampling;the sample size by converting the designing efficient into the above-mentioned sample size required.