Abstract Closed-form expressions for the detection probability, false alarm probability and energy detector constant threshold are derived using approximations of central chi-square non-central distributions. The used show closer proximity to original functions when compared in literature. novel allow gains up 6% 16% terms measured miss-detection respectively, if Central Limit Theorem approach....

Many statistical hypotheses can be formulated in terms of polynomial equalities and inequalities in the unknown parameters and thus correspond to semi-algebraic subsets of the parameter space. We consider large sample asymptotics for the likelihood ratio test of such hypotheses in models that satisfy standard probabilistic regularity conditions. We show that the assumptions of Chernoff's theore...

e22035 Background: HER-2 amplification and consecutive overexpression is a predictor for poor prognosis in breast cancer patients. In addition, incomplete resection of HER2 overexpressing tumors leads to increased proliferation of residual breast cancer cells. While the local release of cytokines is thought to be responsible for the malignant behaviour of remaining tumor tissue, the exact mecha...

The "NPD ratio," widely used by yeast geneticists, is of limited applicability and is prone to falsely indicate significant crossover interference in a chi-square test. A simple, better chi-square test for interference in two-factor crosses is described.

BACKGROUND Altered spinal mobility is thought to be related to current or past episodes of low back pain; however evidence of that relationship in younger subjects has not been established. The purpose of this study was to compare lumbar segmental mobility in asymptomatic and symptomatic subjects during posterior to anterior (PA) manual spinal mobilization and a self-initiated prone press-up (P...

OBJECTIVE To identify factors that may be associated with lingual tonsil hypertrophy (LTH). STUDY DESIGN Case series with chart review. SETTING Tertiary academic center. SUBJECTS AND METHODS Retrospective chart review identified 380 patients from August 2013 to April 2014 with graded lingual tonsils, documented during routine flexible laryngoscopy. Lingual tonsils were graded using a 0 to...

The common formula used for converting a chi-square test into a correlation coefficient for use as an effect size in meta-analysis has a hidden assumption which may be violated in specific instances, leading to an overestimation of the effect size. A corrected formula is provided.

Social activities are an important aspect of health and quality of life of the aging population. They are key elements in the prevention of loneliness. In order to create living environments that stimulate older adults to engage in social activities, more insight is needed in the social activity patterns of the aging population. This study therefore analyzes the heterogeneity in older adults' p...