| 释义 |
probit Statistics.|ˈprəʊbɪt|
[f. probability + unit.]
The unit which forms the scale into which percentages may be transformed so that data evenly distributed between 0 and 100 per cent become normally distributed with a standard deviation of one probit.
1934C. I. Bliss in Science 12 Jan. 38/1 These arbitrary probability units have been called ‘probits’. 1947D. J. Finney Probit Analysis iii. 20 The probit of the proportion P is defined as the abscissa which corresponds to a probability P in a normal distribution with mean 5 and variance 1. 1967J. M. Rendel Canalisation & Gene Control ii. 27 This distance from the mean measured in standard deviations is called a ‘probit’.
b. attrib., as probit line, probit unit; probit analysis, the technique of using probits in statistical analysis.
1947D. J. Finney Probit Analysis i. 6 The statistical treatment of quantal assay data has been much aided by the development of probit analysis. 1956Nature 25 Feb. 356/2 In general, high resistance is associated with flat probit/regression lines. The probit lines for resistant strains are nearly always flatter than for normal strains. 1958Immunology I. 225 On transforming the per cent haemolysis into probit units and plotting these results against the reciprocal of the corresponding serum dilution, a linear relationship was obtained. 1968Brit. Med. Bull. XXIV. 248/1 An analysis of variance is given, from which it can be seen, for instance, whether a fit by a set of parallel probit lines is justified. 1975Jrnl. R. Statistical Soc. C. XXIV. 259 Probit analysis of dose-response curves and surfaces. |