ghd nederland Discussion _67 sampling method of op

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Discussion sampling method of operating conditions

Facilitate the efficient organization of sampling. 1.8.2 Advantages (1) to facilitate the organization and implementation of sampling. (2) help improve the accuracy of sample estimates. (3) to meet the various stages of the survey requirements. (4) can be applied to high-volume products plant experience. (5) practical work combined with the use of systematic sampling to form a starting point for symmetric multi-stage random sampling 1.8.3 operating difficulties Offset (1) sampling error estimated workload,[link widoczny dla zalogowanych], and the more the order of the error will be. (2) share over the first three significant sampling error, sample size should be increased; but the ultimate impact on reducing the number of units, lower loan-to-expected first-order unit of representation. (3) multi-stage sampling the huge workload, but also need more funding. 2, organization of practical work, the choice of sampling 2.1 the size of sampling error should be considered under normal circumstances, the relevant flag in the sampling line of equidistant sampling error, and followed by stratified sampling, once again independent of signs is based on the equidistance line sampling, and simple random sampling, cluster sampling depends on the variance between the size of the group. Therefore, in practical work, the marks line up of systematic sampling and stratified random sampling applications than any other organization wide. 2.2 The survey should be noted that the characteristics of the emblem itself,[link widoczny dla zalogowanych], the offset line sampling and stratified sampling results were better, but the overall investigation units need enough to understand and master the characteristics of the survey, otherwise, must have used other sampling organization. 2.3 should be considered human, financial and material constraints in the human, financial and material resources sufficient conditions, the choice of more complex sampling; the contrary,[link widoczny dla zalogowanych], had a simple sampling. 2.4 should be noted that the combination of various sampling using various sampling method has its own conditions of application, inevitably there are some defects, then the actual work, if properly combined with the operation of various sample rejection, the will achieve better results. In short, the sampling methods developed in modern statistical methods applied in the social economy in a short time, all accounts need to be further improved. However, as an important statistical method,[link widoczny dla zalogowanych], over time, will be people gradually understand and master, will eventually widely used in social and economic fields. Discussion 29 Sampling Method of operating conditions
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