Friday / Saturday
نویسنده
چکیده
Two-sample tests for multivariate and especially for non-Euclidean data are not fully explored. This paper presents a novel test based on a similarity graph constructed on the pooled observations from the two samples. It can be applied to multivariate data and non-Euclidean data as long as a dissimilarity measure on the sample space can be defined, which can usually be provided by domain experts. Existing tests based on a similarity graph lack power either for location or for scale alternatives. The new test utilizes a common pattern that was overlooked previously, and works for both types of alternatives. The test exhibits substantial power gains in simulation studies. Its asymptotic permutation null distribution is derived and shown to work well under finite samples, facilitating its application to large data sets. The new test is illustrated on two applications: The assessment of covariate balance in a matched observational study, and the comparison of network data under different conditions.
منابع مشابه
بررسی روایات تعیین روز ظهور
Many well-known traditions reported by the elite and the public is that al-Mahdi will come on Friday. However, there are some other traditions which clearly indicate that the Imam’s comingwill be on Saturday. The question is that which of these two groups of traditions are more valid. This article shows that although Friday is most known to be the day of the coming of the Imam, evidence s...
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