In particular, the bootstrapped standard errors presented in the tables are based on a random resampling of individuals repeated 1000 times from each of the four stratums on which the treatment and control groups are built; namely men and women aged 25-29 and 30-34 30-34
Every FIA ground plot is assigned to a stratum of which a weight is based on its proportion within the estimation unit.
The conditional Poisson model avoids estimating stratum parameters by conditioning on the total event count in each stratum, thus simplifying the computing and increasing the number of strata for which fitting is feasible compared with the standard unconditional Poisson model.
Each individual is assigned a statistical weight based on the stratum to which they belong in the year of survey completion.
Whether a gene has propensity to be inactive or not partly depends on which stratum it resides in [5], [6]: it was previously observed that genes on older strata tend to get inactivated, while those on newer strata tend to escape inactivation.
These rocks sit upon strata forming the broader hill on which the Tor stands; the various layers of the Beacon Limestone Formation and the Dyrham Formation.
The criteria on which these strata were determined included the population density (persons/km), the number of physicians per 100,000 people, the percentage of people with a college education, the percentage of people over 65 years of age, and the percentage of agricultural workers.
He speculated, based on the strata in which these fossils were found, that large reptiles had lived prior to what he was calling "the age of mammals".
Most importantly, in cooperation with the other strata, the stratum of represented objects may present "metaphysical qualities" such as the tragic, the dreadful, the peaceful and so on, which characterize true works of art.
