نتایج جستجو برای: multi _ chi square test
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Noncentral chi-square distributions play an important role in statistics. They occur for instance as exact or limiting distributions of test statistics under alternatives. To examine the power functions of such tests we come across the problem of comparing distribution functions of noncentral chi-square variables. In this section inequalities are presented, which make such a comparison possible...
We address the problem of testing the hypothesis H0 that the letters from some alphabet A = {a1, a2, . . . , ak}, are distributed uniformly (i.e. p(a1) = p(a2) = . . . = p(ak) = 1/k) against the alternative hypothesis H1 that the true distribution is not uniform, in case k is large. (It is typical for random number testing and some cryptographic problems where k = 210 ∼ 230 and more, see [2, 8,...
The classical chi-square test of goodness-of-fit compares the hypothesis that data arise from some parametric family of distributions, against the nonparametric alternative that they arise from some other distribution. However, the chi-square test requires continuous data to be grouped into arbitrary categories. Furthermore, as the test is based upon an approximation, it can only be used if the...
یکی از عوامل متعددی که در رسیدن به توسعه کشاورزی ضروری می باشد، افزایش تولید در واحد سطح است و این امر فقط در سایه استفاده صحیح از تکنولوژی و نتایج تحقیقات امکان پذیر بوده که بالطبع برخورداری کشاورزان از کارشناسان کارآمد و آگاه را می طلبد. بدین ترتیب فارغ التحصیلان غنی از اطلاعات علمی و عملی در کشاورزی جهت اشتغال یا راهیابی به سطوح بالاتر آموزشی، نیاز به سرمایه گذاری در برنامه های آموزشی دانشجو...
Art Assessment: Strongly Like & Like 34 76%° 26% * Indifferent 46 52% 26% * Strongly Dislike & Dislike 20 45% 35% Note: 0Indicates statistical significance at the 0.05 level according to binomial test. A chi-square test was also performed for the contingency table relating preference and identification for all Ss, and, as might be expected from the preceding, preference and identification were ...
Various chi-square statistics are used for testing structural equation models. A commonly used chi-square is the Satorra-Bentler (SB) statistic. This is a normal-theory chi-square corrected for non-normality in the observed variables. The relationship between the SB statistic and kurtosis is developed and it is shown that the SB statistic tends to decrease with increasing kurtosis if the model ...
QUESTION UNDER STUDY Depression in young adults is common, but data from Switzerland are scarce. Our study gives a point prevalence estimate of depression in young Swiss men, and describes the association between depression and education, material and social resources, and job/school satisfaction. METHODS We used data from the cross-sectional Swiss Federal Surveys of Adolescents (ch-x) from 2...
We conducted a theory-driven process evaluation of a cluster randomized controlled trial comparing two types of complementary feeding (meat versus fortified cereal) on infant growth in Guatemala, Pakistan, Zambia and the Democratic Republic of Congo. We examined process evaluation indicators for the entire study cohort (N = 1236) using chi-square tests to examine differences between treatment g...
OBJECTIVES To assess the prevalence, perception and pattern of tobacco use among 13-15-year-old urban school boys along with associated factors of tobacco use. METHODS A cross sectional, observational, study was carried out among 454 urban school boys aged 13-15 years studying in VIII, IX, X using self administered modified Global Youth Tobacco Survey Questionnaire. Data were analyzed by freq...
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