Systematic sampling is a commonly used technique due to its simplicity and ease of implementation. The drawback of this simplicity is that it is not possible to estimate the design variance without bias. There are several ways to circumvent this problem. One method is to suppose that the...

The estimation of the sample size is a crucial part of the planning process of a survey and it can be accomplished in different ways, some of them require information not available or that may be obtained with a substantial cost. The estimation of the sample size can be done by using the design...

INEGI publishes, on a monthly basis, national indexes for sector, subsector and industry group of wholesale and retail trade, and state indexes for commerce sector based on information from the Monthly Survey of Commercial Establishments, EMEC. Although the sample design of this survey is...