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Besides that, the method we adopt here is based on the eigenvalue distribution of the approximated sample covariance matrix [21].
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Alternative weighting strategies could use empirically approximated sampling variances based on independent replicates of samples or using leave-one-out Jackknife procedures [ 13, 14].
Because the ratio of sample size to population size was small, we approximated the sample design by a "with-replacement" design for purposes of variance estimation in SUDAAN.
can be approximated using sample averages.
The approach is a computational one in which quantities that are intractable to evaluate exactly are approximated by sample averages from randomized algorithms.
Schmandt and Galán recently introduced a novel stochastic shielding approximation as a fast, accurate method for generating approximate sample paths from a finite state Markov process in which only a subset of states are observable.
60,000 Approximate sample size of The New York Times wedding announcements analyzed by WeddingCrunchers.com, the new data-driven site from the brains behind Rap Genius.
An approximate sample size and the evaluation of its performance for two arms are also given.
Moreover, the corresponding approximate sample size formulae are valid asymptotically in the sense that the exact powers associated with the approximate sample size formulae are generally close to the prespecified power level.
Tenax sampling tubes were deployed inside the case for 98 d, giving an approximate sample volume of 70 dm3.
In [32], an importance sampling approximation of the univariate target pdf is employed and a resampling step is performed in order to provide an "approximate" sample from the full-conditional.
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