Search results
Results from the WOW.Com Content Network
Population structure (also called genetic structure and population stratification) is the presence of a systematic difference in allele frequencies between subpopulations. In a randomly mating (or panmictic ) population, allele frequencies are expected to be roughly similar between groups.
Stratification is the process of dividing members of the population into homogeneous subgroups before sampling. The strata should define a partition of the population. That is, it should be collectively exhaustive and mutually exclusive: every element in the population must be
Graphic breakdown of stratified random sampling. In statistics, stratified randomization is a method of sampling which first stratifies the whole study population into subgroups with same attributes or characteristics, known as strata, then followed by simple random sampling from the stratified groups, where each element within the same subgroup are selected unbiasedly during any stage of the ...
Population based association mapping has been modified to control population stratification or relatedness in nested association mapping. Still there is one other limitation in population based QTL mapping; when the frequency of the favorable allele should be relatively high to be detected.
Stratification of clinical trials is the partitioning of subjects and results by a factor other than the treatment given. Stratification can be used to ensure equal allocation of subgroups of participants to each experimental condition. This may be done by gender, age, or other demographic factors.
Stratification (clinical trials), partitioning of subjects by a factors other than the intervention; Stratification (vegetation), the vertical layering of vegetation e.g. within a forest; Population stratification, the stratification of a genetic population based on allele frequencies
Multilevel regression with poststratification (MRP) is a statistical technique used for correcting model estimates for known differences between a sample population (the population of the data one has), and a target population (a population one wishes to estimate for).
Population structure may refer to many aspectsof population ecology: Population structure (genetics) , also called population stratification Population pyramid