In parametric modeling of loss distributions in actuarial science, a versatile choice with intermediate tail weight is the lognormal distribution. Surprisingly, however, the fitting of this model using estimators which are at once efficient and robust has not been seriously addressed in the extensive literature. Consequently, for example, typical estimators of the lognormal mean and variance fa...

A general program was written which simulates radioactive labeling of RNA in viva. The program was used to determine the effect that different -distributions of half-lives would have on the composite decay curve observed in a pulse-chase experiment. Four biologically relevant points emerge: 1) The published, experimentally determined composite decay curves for eukaryotic mRNA are not compatible...

The scaling theory approach has been widely used as an effective method to describe the variation of soil hydraulic properties. In conventional scaling, reference retention curves and scaling factors are determined from minimization of residuals. Most previous studies have shown that scaling factors are lognormally distributed. In this study, we derived physically based scaling factors, assumin...

With more than 500 biological data a frequency distribution analysis is worthwhile which may be approximated by a lognormal curve (in biology: order) or by a normal = Gaussian curve (coincidence, chaos). For the analysis of the data are in use the Chi-square and the Kolmogorov-Smirnov tests. In 587 patients with different diagnoses we investigated the tendencies of these groups towards (a) a ri...

UNLABELLED The purpose of this research was to examine the distribution of the tooth size in a large sample. The objective teeth were the left upper and lower fourteen teeth except the third molar. The tooth size of 1,000 dental casts from the Japanese female orthodontic patients was measured. On each of them, a histogram and a set of statistics (mean, standard deviation, coefficient of variati...

加入変動を考慮した資源動態シミュレーションにおいて，バイアス補正項を考慮した対数正規分布が使われることが多い。しかし，加入尾数の変動が過程誤差であれば，バイアス補正により本来の加入尾数の変動と同じ分布は再現できない。一方，観測誤差による見かけ上の変動であれば変動させる必要がない。最大持続生産量（MSY）の推定において，バイアス補正は行わず実際の変動のみでシミュレーションを実施し，バイアス補正ありの結果と比較した。バイアス補正を行う現在の推定方法では，MSY等を過小または過大評価する可能性がある。

Citations are increasingly used for research evaluations. It is therefore important to identify factors affecting citation scores that are unrelated to scholarly quality or usefulness so that these can be taken into account. Regression is the most powerful statistical technique to identify these factors and hence it is important to identify the best regression strategy for citation data. Citati...

In the present study an effort has been made to find out the best fitting distribution of wind speed data recorded in Islamabad on a daily basis for the years 2001 to 2003. For this purpose two parameter Gamma, Weibull, Lognormal, Rayleigh, three parameter Burr and Frechet distributions are fitted to data and parameters for each distribution are estimated using the Maximum Likelihood (ML) metho...

Innovations are known to arrive more highly clustered than if they were purely random, and their rate of arrival has been increasing nearly exponentially for several centuries. Their distribution of importance is highly skewed and appears to obey a power law or lognormal distribution. Technological change has been seen by many scholars as following technological trajectories and being subject t...