Grossing-up factors
Grossing-up factor for the local unit:
Within each sampling stratum, grossing-up factors are calculated for each local unit, based on the number of local units in the sample and the number of local units in the population. The factor indicates the number of local units in the population that each local unit in the sample represents.
Grossing-up factor for employees:
The grossing-up factor for employees is the factor by which the number of employees in the sample need to be multiplied to obtain population estimates. For each local unit, it will be based on the number of the employees sampled within the unit and the total number of employees in the local unit, combined with the grossing-up factor for the local unit.
In cases 2 and 3 the weights attached to each institution in the sample shall be adjusted by means of an established statistical method derived from the theory of sampling. The weight attached to each reporting agent is the inverse of its selection probability and hence the expansion factor.
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