Moreover, as one person was randomly selected from each selected household, the probability of selection also varied by household size.
A stratified sample of 132 schools was selected with probability of selection proportional to size.
In the first stage, primary sampling units (shiakhas/towns and villages) were selected with probability of selection proportional to size.
First, 18 middle super output areas (MSOAs) were selected with the probability of selection proportionate to population size.
In each stratum, we selected clusters (barrios) with replacement and probability of selection proportional to size.
This PDF represents the probability of selection of each element of the individual.
In such case, probability of selection of noisy pixel as median value becomes higher.
The key to polling's accuracy is the principle of "equal probability of selection".
The last trade has Biden surging 19 points to 50% probability of selection.
For NR modules, the simulation was similar but all experiments had an equal probability of selection.
The DHS employs a multistage stratified design with probabilistic sampling with each household having an equal probability of selection.
