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If the enrichment design has a larger power because the stratification design is using an adjustment for multiple testing due to performing two tests (for F and S).
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However, also for small negative and small the stratification design is preferable under the sponsor view.
The smaller the larger the area where the stratification design is preferable in terms of the given utility functions.
Note also that there is a dilution of the treatment effect in the full population for the stratification design.
The same baseline stratification design applied in PHOENIX 1 was used in this study.
However, because the stratification of the sample's design affects the variance estimates calculated using the sampling weights alone, replicate methods were used to calculate variance estimates.
For the design is adaptive with a first stage corresponding to a stratification design and a second stage corresponding to the stratification or enrichment design depending on the interim decision.
The sample is drawn using a two-stage stratification design.
The NAFORMA plots were established using a systematic double sampling for stratification design with clustered plots [31].
Because the stratification of education is undermining the accessibility of the American Dream.
The randomized trials are limited by inadequate stratification designs that resulted from insufficient funding availability.
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