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Using power transformations when approximating quantiles
Fearn, Nebenzahl
Communication in Statistics- Theory and Methods1 Jan 1995
NobleIDark:/48914/w1/20260525/6AB0B64DDOI10.1080/03610929508831541
Using power transformations when approximating quantiles
Fearn, Nebenzahl · Communication in Statistics- Theory and Methods · 1995 · Subscription
NobleIDark:/48914/w1/20260525/6AB0B64DDOI10.1080/03610929508831541
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Abstract
Estimators are obtained tor quantiles of survival distributions. This is accomplished by approximating Lritr distribution of the transtorrneri data, where the transformation used is that of Box and Cox (1964). The normal approximation as in Box and Cox and, in addition, the extreme value approximation are considered. More generally, to use the methods given, the approximating distribution must come from a location-scale family. For some commonly used survival random variables T the performance of the above approximations are evaluated in terms of the ratio of the true quantiles of T to the estimated one, in the long run. This performance is also evaluated for lower quantiles using simulated lognormai, Weibull and gamma data. Several examples are given to illustrate the methodology herein, including one with actual data.