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September, 1991 Inference for the Crossing Point of Two Continuous CDF's
D. L. Hawkins, Subhash C. Kochar
Ann. Statist. 19(3): 1626-1638 (September, 1991). DOI: 10.1214/aos/1176348266


Let $\mathscr{F}$ denote the set of cdf's on $\mathbb{R}$ with density everywhere positive. Let $C_A = \{(F,G) \in \mathscr{F} \times \mathscr{F}$: there exists a unique $x^\ast \in \mathbb{R}$ such that $F(x) > G(x) \text{for} x << x^\ast \text{and} F(x) < G(x) \text{for} x > x^\ast\}, C_B - \{(F,G) \in \mathscr{F} \times \mathscr{F}: (G,F) \in C_A\}$. Based on independent random samples from $F$ and $G$ (assumed unknown), we give distribution-free tests of $H_0: F = G$ versus the alternatives that $(F,G) \in C_A, (F,G) \in C_B \text{or} (F,G) \in C_A \cup C_B$. Next, assuming that $(F,G) \in C_A$ (or in $C_B$), a point estimate of the crossing point $x^\ast$ is obtained and is shown to be strongly consistent and asymptotically normal. Finally, an asymptotically distribution-free confidence interval for $x^\ast$ is obtained. All inferences are based on a special criterion functional of $F$ and $G$, which yields $x^\ast$ when maximized (minimized) if $(F,G) \in C_A \lbrack(F,G) \in C_B\rbrack$.


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D. L. Hawkins. Subhash C. Kochar. "Inference for the Crossing Point of Two Continuous CDF's." Ann. Statist. 19 (3) 1626 - 1638, September, 1991.


Published: September, 1991
First available in Project Euclid: 12 April 2007

zbMATH: 0729.62046
MathSciNet: MR1126342
Digital Object Identifier: 10.1214/aos/1176348266

Primary: 62G10
Secondary: 62G05 , 62G15

Keywords: Criterion functional , Survival analysis , weak convergence

Rights: Copyright © 1991 Institute of Mathematical Statistics


Vol.19 • No. 3 • September, 1991
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