Normal Approximation for Isolated Balls in an Urn Allocation Model
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1. | Title | Title of document | Normal Approximation for Isolated Balls in an Urn Allocation Model |
2. | Creator | Author's name, affiliation, country | Mathew D. Penrose; University of Bath; United Kingdom |
3. | Subject | Discipline(s) | |
3. | Subject | Keyword(s) | Berry-Esseen bound, central limit theorem, occupancy scheme, size biased coupling, Stein's method. |
3. | Subject | Subject classification | Primary 60F05. Secondary 62E17, 60C05. |
4. | Description | Abstract | Consider throwing $n$ balls at random into $m$ urns, each ball landing in urn $i$ with probability $p(i)$. Let $S$ be the resulting number of singletons, i.e., urns containing just one ball. We give an error bound for the Kolmogorov distance from the distribution of $S$ to the normal, and estimates on its variance. These show that if $n$, $m$ and $(p(i))$ vary in such a way that $n p(i)$ remains bounded uniformly in $n$ and $i$, then $S$ satisfies a CLT if and only if ($n$ squared) times the sum of the squares of the entries $p(i)$ tends to infinity, and demonstrate an optimal rate of convergence in the CLT in this case. In the uniform case with all $p(i)$ equal and with $m$ and $n$ growing proportionately, we provide bounds with better asymptotic constants. The proof of the error bounds is based on Stein's method via size-biased couplings. |
5. | Publisher | Organizing agency, location | |
6. | Contributor | Sponsor(s) | Alexander von Humboldt Foundation |
7. | Date | (YYYY-MM-DD) | 2009-10-06 |
8. | Type | Status & genre | Peer-reviewed Article |
8. | Type | Type | |
9. | Format | File format | |
10. | Identifier | Uniform Resource Identifier | http://ejp.ejpecp.org/article/view/699 |
10. | Identifier | Digital Object Identifier | 10.1214/EJP.v14-699 |
11. | Source | Journal/conference title; vol., no. (year) | Electronic Journal of Probability; Vol 14 |
12. | Language | English=en | |
14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
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