English

Counterexamples to the classical central limit theorem for triplewise independent random variables having a common arbitrary margin

Statistics Theory 2022-05-25 v3 Probability Statistics Theory

Abstract

We present a general methodology to construct triplewise independent sequences of random variables having a common but arbitrary marginal distribution FF (satisfying very mild conditions). For two specific sequences, we obtain in closed form the asymptotic distribution of the sample mean. It is non-Gaussian (and depends on the specific choice of FF). This allows us to illustrate the extent of the 'failure' of the classical central limit theorem (CLT) under triplewise independence. Our methodology is simple and can also be used to create, for any integer KK, new KK-tuplewise independent sequences that are not mutually independent. For K4K \geq 4, it appears that the sequences created using our methodology do verify a CLT, and we explain heuristically why this is the case.

Keywords

Cite

@article{arxiv.2104.02292,
  title  = {Counterexamples to the classical central limit theorem for triplewise independent random variables having a common arbitrary margin},
  author = {Guillaume Boglioni Beaulieu and Pierre Lafaye de Micheaux and Frédéric Ouimet},
  journal= {arXiv preprint arXiv:2104.02292},
  year   = {2022}
}

Comments

15 pages, 5 figures, 1 table

R2 v1 2026-06-24T00:52:32.959Z