Results 251 to 260 of about 3,160,245 (302)

Estimation of Variance of the Ratio Estimator

Biometrika, 1982
SUMMARY A general class of estimators of the variance of the ratio estimator is considered, which includes two standard estimators vo and v2 and approximates another estimator VH suggested by Royall & Eberhardt (1975). Asymptotic expansions for the variances and biases of the proposed estimators are obtained.
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Estimation of cumulative odds ratios

Annals of Epidemiology, 2004
Standard estimation of ordered odds ratios requires the constraint that the etiologic effects of exposure are homogenous across thresholds of the ordered response. We present a method to relax this often-unrealistic constraint.The kernel of the proposed method is the expansion of observed data into "person-thresholds." Using standard statistical ...
Stephen R, Cole, Paul D, Allison, Cande V, Ananth   +2 more
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NOTE ON RATIO ESTIMATION

Scandinavian Journal of Psychology, 1967
Analysis of the individual matrices of ratio estimates, obtained in four experiments, show (1) that the subjective range of scales depends on the individual ‘level of estimation’, and (2) that the relation between scales representing low and intermediate level of estimation is a power function and the relation between the scales from high and ...
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Estimates for Conformal Metric Ratios

Computational Methods and Function Theory, 2006
Let \(D\) be a domain in the Riemann sphere \(\widehat{C}\) possessing at least two boundary points. For a point \(z\in D\), let \(\lambda_D(z)\) be the hyperbolic density in \(D\) and let \[ \mu_D(z):=\inf\{\lambda_\Delta(z):z\in \Delta\subset D,\;D\text{ is a disk in } \widehat{C}\} \] be the Möbius metric-density in \(D\).
Herron, David A., Ma, William, Minda, David   +2 more
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Approaches for estimating prevalence ratios

Occupational and Environmental Medicine, 2008
Recently there has been much interest in estimating the prevalence (risk, proportion or probability) ratio instead of the odds ratio, especially in occupational health studies involving common outcomes (for example, with prevalence rates above 10%). For example, if 80 out of 100 exposed subjects have a particular disease and 50 out of 100 non-exposed ...
J A, Deddens, M R, Petersen
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A ratio estimator in path sampling

Communications in Statistics - Simulation and Computation, 2019
AbstractIn this paper, a ratio estimator is proposed for path sampling, which is a cost-effective sampling design for spatial population where population paths are created and sampled.
Mena Patummasut, Sudarat Nidsunkid
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On estimating the variance of the ratio estimator

Statistics, 1988
An alternative general class of estimators of the variance of the ratio estimator is considered. The class includes the classical variance estimator v0 . Asymptotic expansions for the biases and variances of the proposed estimators are obtained and a comparison of the relative merits of the estimators v0 vs1 and vs2 is made. Conditions under which each
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Estimation of the Average Hazard Ratio

Biometrika, 1981
SUMMARY Simple estimators of the average hazard ratio are obtained for the two sample problem with censored failure time data. These estimators are compared with estimators arising out of the partial likelihood within the proportional hazards class. Efficiency results are found to be generally quite favourable provided the hazard ratio is not too large.
Kalbfleisch, John D., Prentice, Ross L.
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Ratio-Estimations of Loudness-Intervals

The American Journal of Psychology, 1967
Two loudness-scales have been published: (a) the sone scale,1 and (b) the lambda scale.2 These two scales, based on different scaling procedures, are quite divers. The sone scale, based on direct estimates of the apparent ratios of loudnesses, is a power function of sound-intensity with an exponent of 0.3.
J, Beck, W A, Shaw
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