In the case of randomized designs, the purpose of ANCOVA is to reduce error variance, whereas in the case of non-randomized designs (or of analyses involving substantial pre-existing group differences), ANCOVA is used to adjust the post-test means for pre-test differences among groups (Dimitrov et al. 2003).
The creamy, pucker moisturizing concoctions by Sweet Leaf Bath ($4.75) certainly sound tasty, but they're meant for pre-smooch prep, not nibbling.
The means for the pre, retrospective-pre as well as post scores are shown in Table 2 ("status" row).
Among the questions now being asked is what this means for Britain's pre-eminent security relationship with America, and what damage it will do to the more recent and more fragile defence partnership with France, strengthened by recent interventions in Libya and Mali.
Using the above mechanisms it provides means for automated data pre-processing, model validation, selection and adaptation which can be used to significantly simplify the soft sensor building and maintenance process.
One of the best judges of what the change means for people with pre-existing conditions are the organizations that represent such people.
Various GLP-1 chimera through fusion with either mouse IgG-Fc or human IgG-Fc constructs are designed in order to provide a means for pre-clinical and clinical research.
For corporations, therefore, one means for pre-empting this anticipated 'principal-agent' problem has been to pay top managers partly in shares or share options [ 8, 9].
Cross-sectional construct validity was determined by scrutinising the gradient in means for pre-treatment scores across the global item categories of how much the child's oral condition affected his/her overall well-being.
In addition, the use of this technique has been described as means for pre-oxygenation before intubation [ 24], in the post-extubation period [ 25], in patients with do-not-intubate order [ 26], in the palliative care setting [ 27], in the emergency department [ 28] and in patients with heart failure [ 29].
A tumour xenograft model provides a means for pre-treatment drug testing, which allows the study of molecular changes in tumour in response to treatment, which hopefully will lead to better understanding of the molecular mechanisms underlying the clinical activity of sorafenib in RCC.
