Exact(8)
We also randomized the design of the coupon (e.g., 10% off, 20% off, 30% off, or 50% off) for the same store, and even randomized the format ("price 50% off" vs. "buy one get one free").
Even randomized trials, however, can produce misleading conclusions because of inherent weaknesses or bias in study design, analysis, and interpretation.
Even randomized clinical trials — the "gold standard" for clinical research — were two and a half times as likely to find adverse effects if a drug company did not pay for the work.
These bounds are sharp enough to give a clear picture of the processor-time trade-offs that are possible, to establish that randomized parallel algorithms are much more powerful than deterministic ones, and to show that even randomized algorithms cannot make effective use of extremely large numbers of processors.
However, to address these issues, future prospective studies with large sample size and even randomized clinical trials may be necessary.
There have been studies and even randomized clinical trials on non-operative treatment of hip OA but the methodological quality is often poor.
Similar(52)
Therefore, at face value, these causal orientation methods have the potential to reduce the number of, and in some cases even eliminate, randomized experiments needed for causal orientation of edges in the Markov equivalence class of graphs and make the causal model fully identifiable from observational data alone.
We were unable to find a high quality, monotonic fit to this parameter even after randomizing the initial state for the simulated annealing optimization algorithm.
In particular, IV analyses depend on the assumption that subjects were effectively randomized, even if the randomization was accidental (in the case of an administrative policy change or exposure to a natural disaster) and adherence to random assignment was low.
GSK has predicted that by January it will have at least 10,000 doses of its vaccine an Ebola surface protein gene stitched inside a harmless chimpanzee adenovirus which means that even if the randomized, controlled studies are done, there may be enough for less rigorous designs such as the step-wedge trial.
Even if not randomized, our study compared two groups of patients with otherwise strictly identical care management.
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