A new graphical procedure for multiple comparisons of k standard deviations is provided. As a test for homogeneity of variances, the new procedure has similar type I and type II error properties as the Brown and Forsythe (1974) version of the Levene (1960) test, W50. The graphical display associated with the multiple comparisons test, however, provides a useful visual tool for screening samples...

the stability of ten winter safflower cultivars and lines was evaluated in three different environmental conditions in karaj, isfahan and darab in iran, a randomized complete block design with 4 replications over three years (1995, 1996 and 1997). simple analysis of variances of grain and oil yields from each experiment showed significant differences among the genotypes. after conducting a homo...

New nonparametric rank tests for homogeneity and component independence are proposed, which are based on data compressors. For homogeneity testing the idea is to compress the binary string obtained by ordering the two joint samples and writing 0 if the element is from the first sample and 1 if it is from the second sample and breaking ties by randomization (extension to the case of multiple sam...

abstract natural disasters threatening and endangering human communities has resulted in the study and research of such disasters through the related sciences and present methods of forecasting their behavior with time and place and also from a qualification and quantity viewpoint. to this end, numerous methods for the determination of the maximum flood in various return period has been made av...

This research is difficult to positionreturnorgrippingpalmlack of handsconsistencyin a releaseshe wasmomentshooting,causeclearanceWhichlesswell in one game. As result the grip on holding ball wrong then it causes when doing shooting free throw accuracy not right basketball hoop, therefore researchers provide toolsshotloc. The purpose this improve throws. type experimental with quantitative appr...

Suppose a random sample of individuals is drawn from a population with N disjoint classes. The population is said to be homogeneous when all the classes have the same abundance. Otherwise, it is said to be heterogeneous. The number of individuals from each class in the sample is assumed to be Poisson distributed. There is a vast literature towards the estimation of N . Although the performance ...

Little is known about mate choice preferences outside Western, educated, industrialised, rich and democratic societies, even though these Western populations may be particularly unrepresentative of human populations. To our knowledge, this is the first study to test which facial cues contribute to African perceptions of African female attractiveness and also the first study to test the combined...

We wish to formally test for changes in the taxonomic diversity of a community, especially in the presence of high latent diversity. Drawing on the meta-analysis literature, we construct a model for diversity that accounts for covariate effects as well as sampling variability. This permits inference for changes in richness with covariates and also a test for homogeneity. We argue that we can us...

Received May 1974, revised version received April 1975 The question of whether to pool two samples in variance estimation is often decided via a preliminary F test. In this paper we show that the optimal pre-test F value is unity for a onesided alternative, where the objective function is to minimize average relative risk. The outcome is independent of numbers of degrees of freedom in each samp...