Since the sampling strategy was stratified by province, we draw upon robust standard errors clustered by province to assess statistical significance.
While, programs stratified with respect to aggregates can be used in many applications, more advanced applications require the use of aggregates in more general settings.
The upper part (which is stratified above a lower massive unit) could therefore record a younger and time-averaged magnetization equivalent to a palaeomagnetic pole.
The case next in complexity is that of three continuously stratified layers contained between two rigid boundaries and separated by two surfaces of density discontinuity.
Table 3 presents the results of analysis stratified by neonatal pathological conditions.
A community-dwelling sample of 1,118 people stratified by ethnic group and income was compiled using a cluster technique.
Clearly, a term is stratified if and only if it contains stratified constants only.
A multi-stage, stratified, random sampling procedure was used to identify the sample.
