Sentence examples for strata clusters from inspiring English sources
In most strata, clusters were selected with probability proportional to size (PPS).
Within strata, clusters were randomly allocated to multiple cleansing, single cleansing, or dry cord care arms using the procedure with a constant block size of three.
We calculated univariate summary statistics for the NHANES data using survey procedures in SAS software (version 9.2, SAS Institute, Cary, NC) using the relevant strata, clusters, and weights.
We performed the data analysis with the survey procedures using SAS software (version 9.2; SAS Institute, Cary, NC), with the appropriate sample characteristics (strata, clusters, and weights), as described in the NHANES documentation (CDC 2010).
We also performed statistical analysis of urinary BPA concentrations from 47 age- and sex-matched NHANES 2009-2010 participants using the SURVEYMEANS procedures in SAS with relevant strata, clusters, domain, and weights taking into account the complex sampling design.
Analyses were performed with STATA version 12.0 (Stata Corp., College Station, TX, USA), using survey commands, to account for the complex sample survey data composition: strata, clusters and weights.
This work uses a survey of public health to systematically illustrate the effects of incompletely accounting for strata, clustering, and weights.
The latter were stratified by clinical center and age and, within each strata, clustered in blocks of varying sizes.
A statistician blinded to the identity of the strata, and clusters assigned the clusters within each stratum by simple random allocation to either the training or the control.
A statistician - who was blinded to the identity of the strata and clusters - assigned the clusters within each stratum by simple random allocation to either the training or the control group.
The sampling design implemented for accuracy assessment does not change the population or values of the accuracy parameters, but the choice of spatial unit will influence decisions regarding use of strata and clusters in the design.
