Given that not many samples were available for cross-validation, and that the metabolic responses to copper were clearly non-linear, we chose not to use additional supervised multivariate methods.
If not, how many samples are quantified in these experiments?
The protocol that has been made public does not discuss how many samples are taken, where the samples are being taken, chain of custody procedures, quality assurance procedures, or statistical power.
Many samples are not being properly identified, which leads to a corresponding underestimation of biodiversity [417], [418].
Herbstman et al. (2010) did not state how many samples were < LOD for each assessment, so it is possible that the percentage was even higher and may have led to a large impact on the results, particularly given the small sample size for each assessment.
While previous studies have used many hundreds to thousands of these markers to determine population genetic structure [23] [25], genotyping this number of markers in many samples is not feasible for many laboratories due to cost and time considerations.
However, nebulisation for cDNA shearing of many samples is not practical.
But, we do not further check which sample and how many samples were positive for Isospora felis.
But many samples were lost, Allende says.
It is important to emphasize that some possible flaws in the model above were not overlooked: there are not many samples to infer the model, the random variables are not IID (independent and identically distributed), and the mixing model is not perfect.
In a review of studies on flight attendant health, researchers found that most studies are not random samples, were conducted many years ago, rely on self-reported questionnaire data, and suffer from low response rates.
