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Showing 1 to 20 of 262 for “"p-values"”.
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P-Values For Multiple Testing Procedures
… or Sidak [1967] procedures, make use of the P-values, or significance values, of the individual tests, and further assume that P-value statistics are independent and identically distributed according to a uniform distribution under the null hypotheses. However, if the parametric model for the …
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Developing Criteria for Extracting Principal Components and Assessing Multiple Significance Tests in Knowledge Discovery Applications
… for estimating mean and 95th percentile eigenvalues for implementing Horn's parallel analysis procedure for retaining components. Certain methods perform better for specific combinations of sample size and numbers of variables. The adjusted normal order statistic estimator (ANOSE), an …
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Change Point Detection and Estimation in Sequences of Dependent Random Variables
… processes and an approximation to calculate p-values is discussed. A Worsley type upper bound for p-values is provided as an alternative. The asymptotic distribution of the dependent LRT is unknown, but the tail probabilities are found to be empirically bounded by chi-square random variables …
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Failure to Reject the p-value is Not the Same as Accepting it: The Development, Validation, and Administration of the KPVMI Instrument
… struggle to properly interpret and report p-values in context; furthermore, there was insufficient evidence to indicate training and experience are positively correlated with performance. These results aligned with the extant literature regarding the p-value misinterpretations of practicing …
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P-VALUE BASED VARIABLE SELECTION FOR GENERALIZED LINEAR MODELS
… differ in how they construct the necessary p-values. Our first proposed method, the generalized two step, creates appropriate p-values by solving a non-trivial linear quadratic equation to construct a data-adaptive linear transformation. This transformation is then applied to an initial fitted …
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Decision value of confidence intervals versus significance testing in surgical research: a mixed methods study
… informal definition of confidence intervals to p-values, confidence intervals were rated more useful than p-values. A modified formula of expected utility theory has been presented to account for a skill’s conditional effect on a decision’s outcomes.
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The Relationship Between the Level of Support Group Participation and Psychosocial Factors in Prostate Cancer Patients Treated with Proton Therapy
… both during and after treatment (both p-values80% highly functioning). Mean levels of sexual functioning and libido were lower at 50%, and 44%, respectively. Support group members were more likely to rely on non-physician sources of information, and non-members on physician sources both …
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Acute tubulo-interstitial nephritis : clinical profile and pathogenic mechanisms
… tended to have reversible renal function with P values of 0.021, 0.018, 0.002 and 0.03 respectively. Comparing the result of investigations between the different diagnosis groups showed that the lymphocyte count tended to be lower in drug induced ATIN and TINU syndrome than in idiopathic acute …
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Distributional aspects of P-value and their use in multiple testing situations
… such experiments have used the distribution of P-values that result from these tests. This dissertation brings together some past research on the distribution of a P-value as a random variable and places it in the context of HDEs"--Abstract, page iii.
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A Random-Linear-Extension Test Based on Classic Nonparametric Procedures
… p-value is replaced by a distribution of p-values. This is related to some recent work on Fuzzy P-values, which was introduced by Geyer and Meeden in Statistical Science in 2005. A special case is to compare two groups when only two objects can be compared at a time. Three matching schemes, …
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Ocular biometric change in orthokeratology. An investigation into the effects of orthokeratology on ocular biometry and refractive error in an adult population.
… shape. Anterior and posterior apical radii and p-values; corneal thickness and anterior chamber depth were measured using the Orbscan IIz; together with ocular biometry by IOL Master and a standard clinical refraction. All measurements were repeated at one night, one week, one, three, six and …
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A Comprehensive Evaluation of Cardiac Electro-Anatomic Mapping Using Body Surface Potentials
… the axis between them significantly different (p-values < 0.05). Inclusion of inhomogeneous electrical properties in the forward model not only reduced the potential magnitudes (14-19% smaller than predicted with a homogeneous model), but also improved the spatial precision of body surface …
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Evaluation and assignment of significance levels to peptide identifications from the database search programs using resampling approach
… tandem mass spectrometry spectra. Permutation p-values were calculated as the fraction of the permutations in the k-permuted databases with match indicator score as extreme as the original spectra match in the target database. The ‘Whole’ k-permuted decoy databases identified most (up to 100%) …
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Significance of Salivary Gland Radioiodine Retention on Post-ablation 131I Scintigraphy as a Predictor of Salivary Gland Dysfunction in Patients with Differentiated Thyroid Carcinoma
… lower after radioiodine therapy (allp values <0.001),whereas only the %wash out were significantly reduced in the submandibular glands (all p values<0.05). For the parotid glands, the TWS+ groups howed larger Δuptake and Δwashout after radioiodine therapy than did the TWS- group (all p …
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An analysis of adherence & equity in access to TB services in Mitchell's Plain, South Africa
… to be significantly associated with adherence (P-values <0.05). There was no significant evidence of inequalities in access by socioeconomic status (all P-values > 0.05). Nonetheless, the results revealed that the poor face increased costs of accessing TB-services, compared to the rich, though …
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Early Pregnancy Maternal Vitamin D Concentrations in Relation to Gestational Diabetes Mellitus, Mood or Anxiety Disorders, and Preeclampsia
… with women who did not develop GDM (both p-values<0.05). Overall, 25[OH]D3, but not total 25[OH]D, was significantly associated with GDM risk. A 5ng/ml increase in 25[OH]D3 was associated with a 14% decrease in GDM risk (p-value=0.02). Women in the lowest quartile for 25[OH]D3 had a 2-fold …
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Analysis and comparison of metrology methods for quantifying micro-endmills
… by microscopy, calculated Student t-test p-values for this method were greater than a set 0.1 significance level for every tool size. All three microscopy methods had p-values below the 0.1 significance level for some tool sizes, suggesting that the laser occlusion method provides the lowest …
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The impact of powered toothbrushing on patients with Diabetes
… or between week 1 and week 6 according to the p values. The p values resulted in p > .05 for all weeks analyzed. The findings for this study regarding the pre- and post-selfmanagement survey indicated no statistical significance as well. The perception of brushing twice daily was the closest to …
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Measurements of condensation coefficient exhibited by water drops grown on rural cloud nuclei
<p>"Values of condensation coefficient, ß, were experimentally determined for water drops grown on cloud nuclei in atmospheric air samples. The measured quantities were supersaturation, final drop size (6 to 7.5 µm radius), and time to grow from near dry radius to final radius. The drops were grown …
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Association Analyses of Estrogen Receptor a Gene Polymorphisms with Bone Geometric Property at The Femoral Neck in Caucasian Nuclear Families
… in total association analyses with P values of 0.005 and 0.031 for single locus and haplotype analyses, respectively. I also found weaker association between SNP5 (rs932477) and CT and BR in total association analyses with P values of 0.035 and 0.041 for single locus analyses and 0.010 …
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