two-stage sampling


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Related to two-stage sampling: Cluster sampling

two-stage sampling

[′tü ¦stāj ′sam·pliŋ]
(statistics)
Sampling from a population whose members are themselves sets of objects and then sampling from the sets selected in the first sampling; for example, to first draw a sample of states and then to draw a sample of representatives to Congress from each state selected.
References in periodicals archive ?
To examine the effect of variation between elements in the two-stage sampling design, sampling four quadrats per station, we created a simple formula in Excel (Microsoft, Seattle, WA) that randomly selected one of the four quadrats from each station and then calculated the means and variances for each survey area.
The research reported in this volume illustrates the kinds of research questions about work and organizations that can and cannot be addressed adequately with a general-purpose survey questionnaire administered via a cross-sectional, two-stage sampling of employees and informants from the establishments that employ them.
The 1996 South Dakota Poll used a two-stage sampling design.
Site personnel seemed to be Table 2: Barge Unloading Two-stage Sampling System unaware of the possible problem with leaving the bag standing open.
One basic assumption underlying the computation of the variance of the contributed number of gametes, V(k), for two-stage sampling of monoecious species is that there is no covariance between the number of female and male gametes contributed per individual within a set of monoecious plants.
Therefore, for two-stage sampling, the variance in the number of contributed gametes, [V.sub.k], should be derived accordingly.