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Currently, prenatal screening for Down Syndrome (DS) uses the mother's age as well as three biochemical markers for risk prediction. Risk calculations for the biochemical markers use a quadratic discriminant function. In this paper we compare several classification procedures to quadratic...
Bondesson's functions in reliability theory are shown to be related to a recursive sequence of probability distributions. These are the ‘higher‐order’ versions of the mean remaining lifetime in an equilibrium renewal process. Based on these functions, classes of distribution functions can be...
This paper presents ways to predict the average queue length, at a manufacturing resource with a constant processing rate, at the time of a new lot arrival. The jobs arrive in constant lot sizes, and the inter arrival time of the lots follows an exponential distribution. Analytical expressions...
In this paper we point out the differences between the most common hazard‐based models, such as the proportional hazards and the accelerated failure time models. We focus on the heteroscestaticity‐across‐individuals problem that cannot be accommodated by them, and give motivation and general...
In the context of a universe of trucks operating in the United States in 1990, this paper presents statistical methodology for estimating a finite universe total on a second occasion when a part of the universe is sampled and the remainder of the universe is not sampled. Prediction is used to...
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