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pro vyhledávání: '"R. A. J. Wixley"'
Autor:
R. A. J. Wixley
Publikováno v:
Drug Information Journal. 31:529-549
A three-stage parametric statistical analysis for destructive toxicokinetic studies is described. It provides an alternative to Bailer's method. In the first stage of the analysis either the log-normal or gamma distribution is fitted to observed conc
Publikováno v:
Experimental & Applied Acarology. 18:445-458
Between 1988 and 1992, 26 strains of Panonychus ulmi (fruit tree red spider mite) were collected from fields in which control failures had been observed with the acaricides clofentezine, hexythiazox or flucycloxuron.
Autor:
A. C. Grosscurt, R. A. J. Wixley
Publikováno v:
Entomologia Experimentalis et Applicata. 59:239-248
Effects of temperature on the activity of flucycloxuron on larval stages of Panonychus ulmi (Koch), based on LC50 values, were highly significant (P < 0.001) with temperature coefficients of −1.7 in both the ranges of 15° to 25 °C and 20° to 30
Autor:
R. A. J. Wixley, M. J. P. Shaw
Publikováno v:
Annals of Applied Biology. 98:339-346
SUMMARY A model based on the concept of the circle of influence of a plant is used to estimate the relationship between yield and area/plant for tobacco crops with gaps in stand. The model predicts the average yield of plants in any configuration tha
Autor:
R. A. J. Wixley
Publikováno v:
Computational Statistics & Data Analysis. 7:1-21
The object of “data-based” quasi-likelihood analysis is to estimate the variance function from the data itself. Asymmetric power transformations, which are (possibly different) transformations applied to the mean sm; as well as to the observed va
Autor:
R. A. J. Wixley, M. J. P. Shaw
Publikováno v:
Annals of Applied Biology. 98:333-338
SUMMARY Plants surrounding a gap in stand compensated to some extent for leaf yield lost to missing plants. The contribution of plants in an adjacent row was much less than that of plants next to the gap within the row. Losses were reduced and qualit
Autor:
A. H. Munro, R. A. J. Wixley
Publikováno v:
Journal of the American Statistical Association. 65:212-225
The expectations of order statistics of a logarithmic-normal distribution are expressed as functions which are linear in a location and a scale parameter but nonlinear in a shape parameter of the distribution. The regression of the observed small-sam
Autor:
R. A. J. Wixley
Publikováno v:
Statistical Modelling ISBN: 9780387970974
Wedderburn’s transformations provide useful rules of thumb for error modelling in the exponential family. Power transformation, variance functions and quasi-likelihoods are discussed from this perspective. Possible uses of “iteratively reweighted
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00544bd5c4702be79d4349c1e66eb675
https://doi.org/10.1007/978-1-4612-3680-1_37
https://doi.org/10.1007/978-1-4612-3680-1_37
Autor:
Douglas M. Hawkins, R. A. J. Wixley
Publikováno v:
The American Statistician. 40:296
It is shown that the fourth root of a chi-squared distributed random variable has a distribution that is very close to normal for all degrees of freedom. The parameters of the approximating normal distribution are given exactly in terms of the gamma