Abstract: It seems fair that the usual sample correlation coefficient should allow improvement when additional samples from the marginals are available. However, some intuitive attempts fail badly. Using control variates, a simple method is presented which asymptotically achieves the optimal improvement.
Abstract: Causal and semicausal stochastic elds may be rewritten in a state-space representation. Local changes in these elds may be regarded as time-varying changes in the parameters of this model. Using a Kalman lter bank, the generalized likelihood ratio may be computed if these changes are known to be in a certain set. If only some scaling parameters are unknown, exact expressions for the generalized likelihood ratio may be found.
Abstract: In this paper a method is developed for estimating the parameters in the multivariate normal distribution in which the missing observavations are not restricted to follow certain patterns as in most previous papers. The large sample properties of the estimators are discussed. Equivalence with maximum likelihood estimators has been established for a subclass of problems. The results of some simulation studies are provided to support the theoretical development.
TL;DR: An economic model for this screening procedure is developed with the consideration of the cost incurred by imperfect quality and the cost associated with the disposition of the rejected items.
Abstract: In a complete inspection (screening) procedure, all of the items are subject to acceptance inspection. If an item fails to meet the predetermined inspection specifications, it is rejected and excluded from shipment. When the inspection on the performance variable is destructive or very costly, it may be economical to use another variable that is correlated with the performance variable and is relatively inexpensive to measure as the screening variable. Suppose that the performance variable is a “larger is better” variable and is positively correlated with the screening variable, The items for which the measured values of the screening variable are smaller than the screening specifications are rejected and excluded from shipment. An economic model for this screening procedure is developed with the consideration of the cost incurred by imperfect quality and the cost associated with the disposition of the rejected items. Solution procedures for the optima1 screening specifications are developed for three qua...