The n samples can be assigned to the strata equally, proportional (i.e., in proportion to strata sizes), optimal (i.e., by strata sizes and strata variances), or by Neyman allocation that in addition to strata size and variance includes the assessment costs per stratum [16].
Genotypes of 880 controls and 1,173 cases were effectively analyzed using conditional and unconditional logistic regressions (age adjustment using similar strata size; 20 46, 46 56, 56 66, and 66 91 years old).
The n samples can be assigned to the strata equally, proportional (i.e., in proportion to strata sizes), optimal (i.e., by strata sizes and strata variances), or by Neyman allocation that in addition to strata size and variance includes the assessment costs per stratum [ 16].
26 A strata block size of two was generated using the Rand Corporation random number table.
The first stage units – census sections – were grouped into strata by size of the municipal population and were then selected with a probability proportional to the size of the population of the stratum.
Data on strata sizes and household sizes for selected EA were obtained and used to calculate weights for individual respondents.
The strata sizes were obtained by applying age-specific lung cancer incidence rates on the district × SEC × age population proportions.
These are families from every walk of life, of socio-economic strata, of size, shape, and color.
Since the actual pore size of strata mostly follows a multi-peak distribution, then a double-peak model F, a three-peak model G, and a four-peak model H are set as the simulation objects.
Before randomisation, the practices will be pre-stratified into four strata based on the size of the practice.
