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作者:Cheng, TT
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作者:Hamilton, CH; Henderson, FM
作者单位:North Carolina State University
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作者:Cheng, TT
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作者:Cornfield, J
摘要:Associated with each value Xi in the population is a number ai, which is unity if that Xi is in a given sample, or zero otherwise; These at''s are useful in deriving finite sampling results such as that for the variance of the sample mean.
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作者:Berkson, J
作者单位:Mayo Clinic
摘要:The author discusses a technique for fitting the logistic growth-function to data on mortality rates at various concs. of a drug. By a simple transformation (which is facilitated by a scale nomograph presented in the article) the function becomes linear. The usual least-squares soln. is then made and theoretical mortalities readily found. A numerical illustration is given. Using chi-square the results appear somewhat better than those obtained by use of the integral of the normal curve in 7 il...
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作者:Bliss, CI
摘要:The chart facilitates interpolation for probability values or chi-square values. The range of probability is from 1.0 down to 0.001. An example on distr. of relative toxicity is given.