According to P, NHK, the first phase of the cable digital TV promotion, the city of P cable subscribers are mainly distributed in urban area of 25 residents' committees and the faubourgs (43 village committee. Among them, 25 residents' committees, which includes some 19664 residents residents, 43 village committee contains 7932 residents residents, a total of 27596 residents.
Implementation of sampling survey, it is necessary to solve the following problems:
1. If the survey using simple random sampling, the sampling frame should be how to define? If using stratified random sampling, stratified mark how to choose?
2. If use simple random sampling, how do you determine the sample size? If the sample size of stratified random sampling and simple random sampling, how to divide the sample size in each layer?
3. Through under simple random sampling and stratified random sampling estimate of the four target variable, respectively, compared to simple random sampling and stratified random sampling estimation efficiency.