This paper is concerned with the null distribution of the likelihood ratio statistic for testing the equality of variances of q nonnormal populations. It is known that the null distribution of this statistic converges to w q 1 under normality. We extend this result by obtaining an asymptotic expansion under general conditions. Numerical accuracies are studied for some approximations of the perc...

conclusions urodynamic studies in children should be performed in preferred voiding position for each kid considering the culture and voiding habits. unfamiliar voiding position may turn the uroflowmetry to a stressful experience for child that make him uncooperative and cause misleading results. results comparison of uroflowmetric indexes between different genders and voiding positions showed ...

Meta-analysis seeks to combine the results of several experiments in order to improve the accuracy of decisions. It is common to use a test for homogeneity to determine if the results of the several experiments are sufficiently similar to warrant their combination into an overall result. Cochran's Q statistic is frequently used for this homogeneity test. It is often assumed that Q follows a chi...

Abstract In Italian, null pronouns are typically interpreted toward antecedents in a prominent syntactic position, whereas overt prefer lower positions. Interpretation preferences Spanish less clear. While comprehension and production have never been systematically compared Italian Spanish, here we look at the for overt- null-subject two languages using same materials. Using an offline task wit...

background: acute myeloid leukemia, as most cancers, results from exposure to carcinogens and an impaired inherited individual capacity to eliminate xenobiotics. the present case-control study measures the relationship between glutathione s-transferase (gst) t1 and m1 null genotypes and the risk of acute myeloid leukemia. methods: we identified the gstt1 andgstm1 genotypes by multiplex polymera...