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Although there is much literature about predator-prey systems with Lévy noise, this study is mainly involved in estimate to the sample Lyapunov exponents.
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We follow the recent literature and apply diff-in-diffs estimates to the matched sample (e.g. Couch and Placzek (2010); Eliason and Storrie (2006); Hijzen et al. (2010); Ichino et al. (2013)).
As such, it would be desirable to plan for an interim analysis of the data during the study in order to estimate the sample size required to run any equivalence tests with sufficient power.
The reproducibility of the imaging technique should also be known in order to estimate the sample size required to evaluate therapy efficacy.
In order to estimate the sample size, we considered the results obtained in the AVENA study, a multicenter evaluation of the nutritional status of Spanish adolescents [ 27], showed that body fat reached the greatest variance among anthropometrical variables [ 17] and was thus considered as the main variable in the EVASYON study.
We conducted a pilot study with 9 final-year medical students in order to estimate the sample size.
Furthermore, in order to estimate the sample size, 2nd grade students (n = 2), 4th grade (n = 2), and 5th grade (n = 2) medical students were asked to grade their recall accuracy for the 63 OEQs.
Further variance reductions can occur in RIL based estimates due to the sample size of RIL.
To compare the effects of a lidocaine constant rate infusion (CRI) combined with 1% isoflurane versus those of 2% isoflurane alone on cardiovascular variables in anaesthetized horses, and to estimate the sample size required to detect a difference in recovery quality.
A 20% rate of abortion was taken from a community based study in north Ethiopia to estimate the sample size, with a margin of error 5%, 95% confidence level and non-response rate of 5%.
12 28 29 We used the larger estimate to calculate sample size in the interest of adequate power.
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