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When the number of items is nine, the performance of CFA becomes more stable with only 6%% out of bound estimates in the sample size 50 and binary response option case.
Thus applying the estimates in the sample size calculation formula for simple random sampling, and correcting for a finite population we planned to sample 125 herds represented as 53, 48 and 24 herds for Blue Lagoon, Lochinvar and Kazungula, respectively.
Despite this limitation, all of the point estimates in the sample of patients were in line with our prior expectations in terms of the order of their magnitudes and corresponding signs.
The equivalent power estimates in the sample of 6032 offspring with fetal genotype available from smoking pregnancies and 19 058 offspring from non-smoking pregnancies were 88% and >99%, respectively.
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Headache prevalence was estimated in the sample (3 month prevalence).
The U.K. provides another example of poor estimation where it was found the actual cost of waste to be on average 25 times that estimated in the sample of businesses examined (Phillips et al. 1999).
Prevalences were estimated in the sample with complete anthropometry data excluding pregnant women.
Using this estimate in the sample size calculation gives 197 in each arm of the trial, assuming 90% power at the 5% significance level.
P < 0.05 two-tailed was considered significant, and confidence intervals at 95%9595% CI) were used for the logistic regression multivariate estimated in the sample.
Furthermore, if the median OS among all patients is substantially different than estimated in the sample size calculation, the DSMC can recommend increasing or decreasing the target accrual in order to maintain statistical power.
Furthermore, if the QOL scores among all patients are substantially different than estimated in the sample size calculation, the DSMC can recommend increasing or decreasing the target accrual in order to maintain statistical power.
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