To control for the nested structure, we considered a multilevel model, rather than simply correcting the estimated standard errors for the presence of clustered units in the sample.
We have modified the text to show these data and to direct the reader to Figure 4a and b, which show data for each unit in the sample from which we quantified these data.
In collecting data for this test, each element or experimental unit in the sample must generate two paired or matched data values, one from population 1 and one from population 2. Differences between the paired or matched data values are used to test for a difference between the two populations.
The GWSM needs inclusion probabilities only for the selected units j in the sample sA.
For each unit of i in the sample, we observe a p x 1 vector of pretreatment covariates, X i ; the treatment received, T i ; and the value of the outcome variable associated with treatment, Y i.
Table 3 presents mean scores and standard deviations for instrumental and conceptual research use for all nurses in the sample, by unit, and by category of context.
Ideally, density data would be collected for all rock units in the Bradys area from surface samples and downhole.
An estimate of the age composition of a commercial swordfish catch and its variance was obtained using the replicate full jackknife estimator for two-phase sampling where the sampling units in the first phase are clusters (vessel-trips) and the units of the second phase are individual fishes.
The aim of this study was to explore perceptions of barriers to screening for IPV on postpartum units in a sample of Canadian nurses.
In our evaluation we distinguish three units: (i) the sample application unit, (ii) the antibody detection unit, and (iii) the nucleic acid unit.
The observations appearing for the first time in the sample are attached a p = 1 (a trivial interpretation is that sample units appearing for the first time in the sample are certain to be in their respective waves).
