| 单词 | log-normal |
| 释义 | > as lemmaslog-normal log-normal adj. Statistics such that the logarithm of the variate is distributed according to a normal distribution. ΘΚΠ the world > relative properties > number > probability or statistics > [adjective] > relating to distribution > normal > of logarithm of variate log-normal1945 1945 J. H. Gaddum in Nature 20 Oct. 465/1 It is proposed to call the distribution of x ‘lognormal’ when the distribution of log x is normal. 1945 J. H. Gaddum in Nature 20 Oct. 465/1 Examples of lognormal distributions have been found in estimates of the numbers of plankton caught in different hauls of the net, and in the amounts of electricity used in medium-class homes in the United States. 1951 Biometrika 38 434 It is assumed that the population distribution of abundance is log-normal. 1971 J. B. Carroll et al. Word Frequency Bk. p. xxi This model..is called the lognormal model, because it postulates that the total vocabulary underlying a corpus is distributed according to the familiar ‘normal distribution’ when the logarithms of the frequencies are used. < as lemmas |
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