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作者：Klaassen, FJGM; Magnus, JR
作者单位：University of Amsterdam; Tilburg University
摘要：This article tests whether points in tennis are independent and identically distributed (iid). We model the probability of winning a point on service and show that points are neither independent nor identically distributed: winning the previous point has a positive effect on winning the current point, and at important points it is more difficult for the server to win the point than at less important points. Furthermore, the weaker a player, the stronger are these effects. Deviations from lid a...
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作者：Kim, H; Loh, WY
作者单位：Worcester Polytechnic Institute; University of Wisconsin System; University of Wisconsin Madison
摘要：Two univariate split methods and one linear combination split method are proposed for the construction of classification trees with multiway splits. Examples are given where the trees are more compact and hence easier to interpret than binary trees. A major strength of the univariate split methods is that they have negligible bias in variable selection, both when the variables differ in the number of splits they offer and when they differ in the number of missing values. This is an advantage b...
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作者：Baker, SG; Pinsky, PF
作者单位：National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI); National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI)
摘要：Because randomized trials have shown a reduction in breast cancer mortality, analog mammography for the early detection of breast cancer has gained widespread use. Recently, several manufacturers have developed digital mammography, which promises great advantages in the storage and transmission of images. We were asked to design a study to compare the two types of mammography in terms of their performance for the early detection of breast cancer. A standard measure of mammography performance i...
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作者：Raz, J; Turetsky, BI; Dickerson, LW
作者单位：University of Pennsylvania; University of Pennsylvania; University of Iowa
摘要：Event-related potentials (ERPs) are brain electrical potentials associated with sensory and cognitive processing. ERP researchers typically wish to separate a recorded time series into functionally distinct component waveforms, and to estimate the effects of experimental conditions on each component. We present an integrated statistical approach to the decomposition of single-channel ERPs and to inference concerning the component waveforms and the effects of experimental conditions on the ampl...
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作者：Sun, JG; Kim, YJ; Hewett, J; Johnson, JC; Farmer, J; Gibler, M
作者单位：University of Missouri System; University of Missouri Columbia; University of Missouri System; University of Missouri Columbia
摘要：Traumatic brain injury (TBI) is among the most devastating of injuries leading to death and disability among young people today. The major cause of TBI is motor vehicle crashes. One way to reduce the rates of such crashes and thus TBI is through prevention programs. This article analyzes a study conducted for assessing a 1-day educational traffic injury prevention program for young traffic offenders with speeding violations. The obtained data include information about traffic convictions for s...
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作者：Bebchuk, JD; Betensky, RA
作者单位：University of Minnesota System; University of Minnesota Twin Cities; Harvard University; Harvard T.H. Chan School of Public Health
摘要：AIDS Clinical Trials Group protocol 193A was a randomized trial designed to compare survival and progression-free survival among patients on different treatment regimens. A complicating feature of the analysis of progression-free survival is that different censoring mechanisms operated on progression and survival, which resulted in more complete information on survival. A simple analysis that uses the minimum of the times to progression and survival and the minimum of the corresponding censori...
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作者：Efromovich, S
作者单位：University of New Mexico
摘要：Do a random censorship and/or order restrictions (e.g., nonnegativity, monotonicity, convexity) affect estimation of a smooth density under mean integrated squared error (MISE)? Under mild assumptions, the known asymptotic results, which are concerned only with rates, answer no. This answer, especially for censored data, contradicts practical experience and statistical intuition. So what can be said about constants of MISE convergence? It is shown that asymptotically (a) censorship does affect...
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作者：Wikle, CK; Milliff, RF; Nychka, D; Berliner, LM
作者单位：University of Missouri System; University of Missouri Columbia; National Center Atmospheric Research (NCAR) - USA; University System of Ohio; Ohio State University
摘要：Spatiotemporal processes are ubiquitous in the environmental and physical sciences. This is certainly true of atmospheric and oceanic processes, which typically exhibit many different scales of spatial and temporal variability. The complexity of these processes and the large number of observation/prediction locations preclude the use of traditional covariance-based spatiotemporal statistical methods. Alternatively, we focus on conditionally specified (i.e., hierarchical) spatiotemporal models....
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作者：Irizarry, RA
作者单位：Johns Hopkins University
摘要：Statistical modeling and analysis have been applied to different music-related fields, including sound synthesis and analysis. Sound can be represented as a real-valued function of time. This function can be sampled at a sufficiently small rate such that the resulting discrete version is a good approximation of the continuous version, thus enabling the study of musical sounds as a discrete rime series, an entity for which many statistical techniques are available. Physical modeling suggests th...
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作者：Maitra, R; Dalal, SR
作者单位：University System of Maryland; University of Maryland Baltimore; Ericsson; Telcordia Technologies
摘要：Payphones, parking meters, and vending machines illustrate the modem business practice of substituting machinery for manpower. They do nor eliminate manual labor completely, because full coin-boxes still must be replaced and vending machines still must be stocked. Deciding when to replace a coin-box is important, with unequal losses resulting from underestimation and overestimation. This article derives optimal methodology for this problem by incorporating collection history and specifying com...
