Design elements - Stratification diagram

The vector stencils library "Stratification diagram" contains 8 multiseries scatterplot templates. Use it to design your stratification diagrams with ConceptDraw PRO diagramming and vector drawing software. "In statistics, stratified sampling is a method of sampling from a population. In statistical surveys, when subpopulations within an overall population vary, it is advantageous to sample each subpopulation (stratum) independently. Stratification is the process of dividing members of the population into homogeneous subgroups before sampling. The strata should be mutually exclusive: every element in the population must be assigned to only one stratum. The strata should also be collectively exhaustive: no population element can be excluded. Then simple random sampling or systematic sampling is applied within each stratum. This often improves the representativeness of the sample by reducing sampling error. It can produce a weighted mean that has less variability than the arithmetic mean of a simple random sample of the population." [Stratified sampling. Wikipedia] The stratification is one of the Seven Basic Tools of Quality. [Seven Basic Tools of Quality. Wikipedia] The example of multiseries scatterplot templates "Design elements - Stratification diagram" is included in the Seven Basic Tools of Quality solution from the Quality area of ConceptDraw Solution Park.