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In a classical fixed sample design, the sample size is set in advance of collecting any data.
A description of the sample design, the techniques used for the different manufacturing steps of the conductor legs, the terminations and the assembly is related.
In the analysis of continuous variables collected through a complex sample design, the sparseness of data in the tail region may lead to relatively poor performance for design-based estimation of distribution functions and also to potential instability of direct design-based estimators of their covariance matrices.
Using a split sample design, the effect of HA at a final concentration of 500 or 1000 μg/ml semen on post-thaw motility parameters, and membrane lipid architecture status assessed by merocyanine-540/YOPRO-1 merocyanine-540/YOPRO-1 merocyanine-540/YOPRO-1
In our survey, which was a multistage sample design, the probability of selection is the joint probability of selection at the three stages of sample selection.
Our proposed method is based on a fixed sample design: the sample size is calculated at the beginning of the trial, all participants complete the baseline questionnaire, and they are then allocated to groups.
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All statistical analyses took the sample design, that is, the clusters and weights, into account.
Under any sampling design the relative gain in efficiency decreases with increasing sample sizes.
If standard multilevel modelling is used without incorporating such a sampling design, the estimators of parameters may be biased.
When implemented as a balanced sampling design, the inclusion probabilities of the population units are known.
NCS employed a three-stage sampling design; the primary sampling units (PSUs) are the 105 locations.
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