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Adjusted chi-square test for degree-corrected block models. (arXiv:2012.15047v2 [math.ST] UPDATED)
Sept. 23, 2022, 1:13 a.m. | Linfan Zhang, Arash A. Amini
stat.ML updates on arXiv.org arxiv.org
We propose a goodness-of-fit test for degree-corrected stochastic block
models (DCSBM). The test is based on an adjusted chi-square statistic for
measuring equality of means among groups of $n$ multinomial distributions with
$d_1,\dots,d_n$ observations. In the context of network models, the number of
multinomials, $n$, grows much faster than the number of observations, $d_i$,
corresponding to the degree of node $i$, hence the setting deviates from
classical asymptotics. We show that a simple adjustment allows the statistic to
converge in …
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