Analysis

All (2) ((2 results))

• 1. Variance estimation when a first phase area sample is restratified Archived

  Articles and reports: 12-001-X199000114555

  Description:

  This paper proposes an unbiased variance estimation formula for a two-phase sampling design used in many agricultural surveys. In this design, geographically defined primary sampling units (PSUs) are first selected via stratified simple random sampling; then secondary sampling units within sampled PSUs are restratified based on their characteristics and subsampled in a second phase of stratified simple random sampling.

  Release date: 1990-06-15

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• 2. Rolling samples and Censuses Archived

  Articles and reports: 12-001-X199000114557

  Description:

  Rolling censuses combine F nonoverlapping periodic samples of 1/F each, so designed that cumulating the F periods yields a complete census of the whole population area with F / F = 1. Intermediate cumulations of k samples would yield samples of k/F for more timely uses (annual or quinquennial censuses). Area sampling frames would cover the national territory for naturally mobile populations. These methods may often be preferable to other alternative methods for censuses, also discussed. Asymmetrical cumulations are also recommended to counter the problems of small sample cells for area domains (provinces, regions, states) common to most countries and to other population units. Split-panel-designs offer another use for cumulating periodic surveys by combining nonoverlapping portions a - b - c - d - with panels p for partial overlaps, pa - pb - pc - pd -, for multipurpose designs.

  Release date: 1990-06-15

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Articles and reports (2) ((2 results))

• 1. Variance estimation when a first phase area sample is restratified Archived

  Articles and reports: 12-001-X199000114555

  Description:

  This paper proposes an unbiased variance estimation formula for a two-phase sampling design used in many agricultural surveys. In this design, geographically defined primary sampling units (PSUs) are first selected via stratified simple random sampling; then secondary sampling units within sampled PSUs are restratified based on their characteristics and subsampled in a second phase of stratified simple random sampling.

  Release date: 1990-06-15

  ---

• 2. Rolling samples and Censuses Archived

  Articles and reports: 12-001-X199000114557

  Description:

  Rolling censuses combine F nonoverlapping periodic samples of 1/F each, so designed that cumulating the F periods yields a complete census of the whole population area with F / F = 1. Intermediate cumulations of k samples would yield samples of k/F for more timely uses (annual or quinquennial censuses). Area sampling frames would cover the national territory for naturally mobile populations. These methods may often be preferable to other alternative methods for censuses, also discussed. Asymmetrical cumulations are also recommended to counter the problems of small sample cells for area domains (provinces, regions, states) common to most countries and to other population units. Split-panel-designs offer another use for cumulating periodic surveys by combining nonoverlapping portions a - b - c - d - with panels p for partial overlaps, pa - pb - pc - pd -, for multipurpose designs.

  Release date: 1990-06-15

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