Results 21 to 30 of about 272,931 (273)

Linear Association in Compositional Data Analysis

open access: yesAustrian Journal of Statistics, 2018
With compositional data ordinary covariation indexes, designed for real random variables, fail to describe dependence. There is a need for compositional alternatives to covariance and correlation.
Juan José Egozcue   +2 more
doaj   +1 more source

Evaluating probability forecasts

open access: yes, 2012
Probability forecasts of events are routinely used in climate predictions, in forecasting default probabilities on bank loans or in estimating the probability of a patient's positive response to treatment.
Gross, Shulamith T.   +2 more
core   +1 more source

Adaptive Regression on the Real Line in Classes of Smooth Functions

open access: yesAustrian Journal of Statistics, 2016
Adaptive pointwise estimation of an unknown regression function f(x), x ? R corrupted by additive Gaussian noise is considered in the equidistant design setting.
L.M. Artiles, B.Y. Levit
doaj   +1 more source

Process Capability Indices as Fuzzy Numbers

open access: yesAustrian Journal of Statistics, 2016
Most of the traditional methods for assessing the capability of manufacturing processes are dealing with crisp quality. In this paper we discuss the fuzzy quality and introduce fuzzy process capability indices, where instead of precise quality we have ...
Abbas Parchami   +3 more
doaj   +1 more source

Discussion of "Estimating the historical and future probabilities of large terrorist event" by Aaron Clauset and Ryan Woodard

open access: yes, 2013
Discussion of "Estimating the historical and future probabilities of large terrorist events" by Aaron Clauset and Ryan Woodard [arXiv:1209.0089].Comment: Published in at http://dx.doi.org/10.1214/13-AOAS614B the Annals of Applied Statistics (http://www.
Porter, Michael D., Reich, Brian J.
core   +1 more source

Teaching Statistics with Excel A Big Challenge for Students and Lecturers

open access: yesAustrian Journal of Statistics, 2016
This paper has a look on the implementation of basic statistical methods in Excel, in particular in describing data. Often a frequency distribution is the starting point for describing a dataset, but its calculation is not that easy in Excel.
Christine Duller
doaj   +1 more source

Relative errors for bootstrap approximations of the serial correlation coefficient

open access: yes, 2013
We consider the first serial correlation coefficient under an AR(1) model where errors are not assumed to be Gaussian. In this case it is necessary to consider bootstrap approximations for tests based on the statistic since the distribution of errors is ...
Field, Chris, Robinson, John
core   +1 more source

The quasi-xgamma frailty model with survival analysis under heterogeneity problem, validation testing, and risk analysis for emergency care data

open access: yesScientific Reports
Frailty models are important for survival data because they allow for the possibility of unobserved heterogeneity problem. The problem of heterogeneity can be existed due to a variety of factors, such as genetic predisposition, environmental factors, or ...
Hamami Loubna   +9 more
doaj   +1 more source

Measurement of Continuous Quantities and their Statistical Evaluation

open access: yesAustrian Journal of Statistics, 2014
Measurement results of continuous quantities are always more or less imprecise. This imprecision is different from errors. The most suitable mathematical model to describe imprecision is by special fuzzy subsets of the set of real numbers R, called ...
Reinhard Karl Viertl
doaj   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

open access: yesAdvanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice   +2 more
wiley   +1 more source

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