Irrespective of these variations, population-based or national household surveys suggest that the majority of children in southern Africa, whether orphans or non-orphans, are members of households with at least one surviving parent.
In many studies of practice variations, populations are arbitrarily divided according to hospitals, regions, counties, or countries.
Variance is partitioned into among group variation, among population variation and within population variation.
During periods of reduced expressed genetic variation populations would respond to phenotypic selection slowly.
The beta-convergence approach proves useful to examine regional variations in population aging across Europe.
Based on Taiwan's experiences, this research calibrates the variations of population's wellbeing.
We did not find any of these variations in population samples from Africa, the Middle East and Asia.
What are the implications of these variations for population exposure?
Variations in population density correlate with variations in concentration of signaling molecules.
This probably resulted from the variations in population size of the Me3-virulent nematodes.
For fleas, the percentage of variation among populations and within populations constituted 85.68% and 14.32%, respectively.
