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The Horsfall-Barratt scale and severity estimates of citrus canker.

Bock, C. H.; Gottwald, T. R.; Parker, P. E.; Cook, A. Z.; … - 2009

Citrus canker assessment data were used to investigate effects of using the Horsfall-Barratt (H-B) scale to estimate disease compared to direct estimation to the nearest percent. Twenty-eight raters assessed each of two-hundred infected leaves (0-38% true diseased area). The data were converted...

Persistent link: https://www.econbiz.de/10009429449

Binomial Sampling to Estimate Rust Mite (Acari: Eriophyidae) Densities on Orange Fruit.

Hall, D.G.; Childers, C.C.; Eger, J.E. - 2007

of bootstrap estimates falling outside expected confidence limits. Although mite count data fit the binomial model …

Persistent link: https://www.econbiz.de/10009429479

Individual tree diameter increment model for managed even-aged stands of ponderosa pine throughout the western United States using a multilevel linear mixed effects model.

Uzoh, Fabian C.C.; Oliver, William W. - 2008

A diameter increment model is developed and evaluated for individual trees of ponderosa pine throughout the species range in the United States using a multilevel linear mixed model. Stochastic variability is broken down among period, locale, plot, tree and within-tree components. Covariates...

Persistent link: https://www.econbiz.de/10009429547

Development and validation of a binomial sequential sampling plan for the greenbug (Homoptera: Aphididae) infesting winter wheat in the southern plains.

Giles, K.L.; Royer, T.A.; Elliott, N.C.; Kindler, S.D. - 2000

From 1997 to 1999, Schizaphis graminum (Rondani), intensity (number per tiller) was estimated on 115 occasions from hard red winter wheat fields located throughout the major wheat growing regions of Oklahoma. A total of 32 and 83 fields was sampled during the fall and spring, respectively. The...

Persistent link: https://www.econbiz.de/10009429548

Determinants of economic well-being among U.S. farm operator households.

El-Osta, Hisham S.; Mishra, Ashok K.; Morehart, Mitchell J. - 2007

Participation in government programs has a mild impact on the economic well-being of U.S. farm households. Major factors that determine farm household prosperity are the primary operator's education level and ethnicity, education level of the spouse, and other characteristics such as forward...

Persistent link: https://www.econbiz.de/10009429566

An investigation into the use of combined linear and neural network models for time series data / A.S. Kruger.

Kruger, Albertus Stephanus - 2009

Time series forecasting is an important area of forecasting in which past observations of the same variable are collected and analyzed to develop a model describing the underlying relationship. The model is then used to extrapolate the time series into the future. This modeling approach is...

Persistent link: https://www.econbiz.de/10009455926

A functional coefficient model view of the saving-investment relation

Fang Xu - 2007

, factor based bootstrap approach is proposed for inferential issues in functional coefficient models. This approach can cope … with heterogeneous error distributions and is proven to hold asymptotically. In simulation studies factor based bootstrap … inference outperforms the wild bootstrap and pairs bootstrap approach according to its size features. Regarding current account …

Persistent link: https://www.econbiz.de/10009429004

APPLICATION OF THE EMPIRICAL LIKELIHOOD METHOD IN PROPORTIONAL HAZARDS MODEL

He, Bin - 2007

In survival analysis, proportional hazards model is the most commonly used and the Cox model is the most popular. These models are developed to facilitate statistical analysis frequently encountered in medical research or reliability studies. In analyzing real data sets, checking the validity of...

Persistent link: https://www.econbiz.de/10009431108

Bootstrapping of Spatially Correlated Data

Agarwal, Prasheen Kumar - 2003

The application of the bootstrap to spatially correlated data has not been studied as widely as its application to time … implementing the bootstrap method. Kunsch (1989), Politis and Romano(1993, Liu and Singh(1992) have suggested bootstrapping methods …

Persistent link: https://www.econbiz.de/10009431163

Testing Patterns of Nucleotide Substitution Rates at Multiple Genes

Tao, Wenli - 2002

Poisson regression in a log-linear model. The third one is a nonparametric approach based on bootstrap percentile confidence … computationally expensive and it has desirable Type I errors in most cases as well as good powers. The bootstrap-based method is the …

Persistent link: https://www.econbiz.de/10009431223