نتایج جستجو برای: t tests
تعداد نتایج: 1009484 فیلتر نتایج به سال:
Student’s t statistic is frequently used in practice to test hypotheses about means. Today, in fields such as genomics, tens of thousands of t-tests are implemented simultaneously, one for each component of a long data vector. The distributions from which the t statistics are computed are almost invariably nonnormal and skew, and the sample sizes are relatively small, typically about one thousa...
Many methods for automated software test generation, including some that explicitly use machine learning (and some that use ML more broadly conceived) derive new tests from existing tests (often referred to as seeds). Often, the seed tests from which new tests are derived are manually constructed, or at least simpler than the tests that are produced as the final outputs of such test generators....
Interference in clinical laboratory testing can create discrepancies in test results which can lead to patient harm. In clinical chemistry, interference is defined as a cause of medically significant difference in the measurand test result due to another component or property of the sample. Interference by endogenous and exogenous substances with assays for clinical analytes is a common prob...
Accepted 21 May 2008 Copyright © EEF ISSN 1399-1183 Statistical analysis is an important and responsible stage in ecological research, often posing a challenge. One of the main problems is that the statistical samples typical of ecological research frequently include data that violate the original assumptions of standard analytical tools. A large array of tests has been designed for data of dif...
There is a significant heterogeneity in reported performance of serological assays for Chagas disease diagnosis. The conventional serology testing in laboratory diagnosis and in blood banks is unsatisfactory because of a high number of inconclusive and misclassified results. We aimed to assess the quality of four commercially available enzyme-linked immunosorbent assay tests for their ability t...
The aim of the present study was to determine the relative value of incremental and constant load tests in detecting changes in inspiratory muscle endurance following high-intensity inspiratory muscle training (H-IMT) in chronic obstructive pulmonary disease. In total, 16 subjects (11 males; forced expiratory volume in one second (FEV(1)) 37.4+/-12.5%) underwent H-IMT. In addition, 17 subjects ...
We first briefly review tests on CP T invariance based on the consequences of the CPT theorem and then present some possible CP T tests due to exotic models in which some of the CPT conditions are lost, such as those without hermiticity.
Abs t rac t . We show how real-time schedulability tests and program refinement rules can be integrated to create a formal development method of practical use to real-time programmers. A computational model for representing task scheduling is developed within a 'timed' refinement calculus. Proven multi-tasking schedulability tests then become available as feasibility checks during system refine...
Intraocular Invasion of Adult T-Cell Leukemia Cells without Systemic Symptoms after Cataract Surgery
Adult T-cell leukemia (ATL) is an aggressive lymphoid proliferation associated with the human T-lymphotropic virus type I (HTLV-I). The intraocular invasion of ATL is a rare event. A 75-year-old man without any systemic disease underwent uneventful cataract surgery of the right eye. On postoperative day 6, the patient presented with blurred vision due to severe vitreous opacity in the right eye...
Routine incorporation of FISH into multiple myeloma (MM) diagnostic testing has led to a better appreciation of the heterogeneity of genetic abnormalities associated with this disease. We studied a group of 484 patients with newly diagnosed symptomatic MM to better understand the prevalence of the various abnormalities and the prognostic significance of the overlapping abnormalities. A transloc...
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