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Exact(21)
In the design of the ¯¯¯X control chart, both the sample size m of ¯¯¯X and the control-limit factor k (the number of standard deviations from the center line) must be determined.
In addition, both the sample size and the proportion of patients with a migration background in this study are considerably larger than those in previous studies (18, 20, 21, 38).
The method accounts for diffuse dissipation in the specimen while ensuring consistent strain rates by scaling both the sample size and testing speed with ligament length.
This is of course a function of the assumed MAFs and ORs; if we reduce the MAFs or the ORs, or both, the sample size requirement will increase.
The calibration procedure needed to address the substantial heterogeneity in regards to both the sample size (e.g. SEER data based a significant percentage of the U.S. population) and data quality of the three calibration targets.
Different objectives have different impacts on both the sample size and patient population selection.
Similar(39)
We see that t∗ and the design assumptions (PH or non-PH) both influence the sample size quite markedly.
The data on the 174 black and Hispanic children in the study were excluded, both because the sample size was too small to analyze separately and because a homogenous population made it easier to separate out the effects of employment, Dr. Brooks-Gunn said.
However, for both studies, the sample size is not very large and the follow-up period still relatively short.
Third, although most demographic or clinical features were relatively balanced between both groups, the sample size was rather small.
For both studies the sample size addresses the effect of interventions on the primary outcome measure – alcohol consumption at 12 months after randomisation.
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