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作者:AITCHISON, J
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作者:BAILEY, RA
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作者:BENEDETTI, JK; LIU, PY; SATHER, HN; SEINFELD, J; EPTON, MA
作者单位:University of California System; University of California Los Angeles; RAND Corporation; University of Southern California
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作者:ROBERTSON, T; WRIGHT, FT
作者单位:University of Missouri System; Missouri University of Science & Technology
摘要:Chase (1974) found a moderately good approximation for the chi-bar-squared, .hivin..chi.2, and E-bar-squared, .hivin.E2, distributions for an important special case of comparing ordered dose levels with a zero control where there are more observations on the control. Chase''s results are sharpened and extended to include the case in which the increased precision is on an intermediate sample. This provides new information concerning the behavior of the .hivin..chi.2 and .hivin.E2 distributions ...
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作者:MILLER, R; HALPERN, J
摘要:There are 4 regression techniques currently available for use with censored data which do not assume particular parametric families of survival distributions. They are due to Cox (1972), Miller (1976), Buckley and James (1979) and Koul, Susarla and Van Ryzin (1981). These 4 methods are described, and their performances compared on the updated Stanford heart transplant data. Conclusions on the usefulness of the 4 procedures are drawn.
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作者:ONEILL, ME
摘要:Lancaster''s additive approach to absence of interaction in contingency tables has been used frequently in agriculture in recent years, sometimes incorrectly. In this paper, the frequency distributions of response for a number of treatment groups which are factorially structured are compared. An additive model is proposed which allows for examination of the role of the individual factors in explaining any differences among responses. Test statistics are developed and the theory is illustrated ...
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作者:SHUKLA, GK
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作者:ATKINSON, AC
摘要:The theory of DA-optimum design of experiments is used to provide designs of the biased coin type for sequential clinical trials in the presence or absence, of prognostic factors. The designs avoid many arbitrary features of earlier schemes.
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作者:HALL, P
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作者:YOUNG, DL