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单词 probit
释义

probitn.

Brit. /ˈprɒbɪt/, U.S. /ˈprɑbət/
Origin: Formed within English, by compounding. Etymons: probability n., unit n.
Etymology: < prob- (in probability n.) + -it (in unit n.).
Statistics.
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 such unit.
ΘΚΠ
the world > relative properties > number > probability or statistics > [noun] > probability > unit of
probit1934
logit1944
1934 C. I. Bliss in Science 12 Jan. 38/1 These arbitrary probability units have been called ‘probits’.
1947 D. J. Finney Probit Anal. 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.
1991 R. Blundell et al. Taxation in Empirical Labour Supply Models (IFS Working Paper W91/9) 9 Note the regional childcare variables, drawn from Regional Trends, in the participation probit.

Compounds

C1.
probit unit n.
ΚΠ
1934 C. I. Bliss in Science 4 May 409/2 It seems desirable..to redefine the probit unit as equal to 5 plus (algebraically) the deviate of the normal curve.
1958 Immunology 1 225 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.
1997 Philos. Trans. (Royal Soc.) B. 352 1188/1 It is also feasible to combine a generalization of the probit unit that uses its y value to pick deterministically one of m possibilities with a generalization of the linear unit that has m different linear regimes.
probit line n.
ΚΠ
1941 Biometrika 32 52 It will be necessary to group the data, and this will also be efficacious in obtaining a provisional probit line.
1968 Brit. Med. Bull. 24 248/1 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.
2000 Jrnl. Risk & Insurance 67 380 The greater concentration of distressed insurers at higher real-estate levels probably forces the logit and probit lines to slope upward.
C2.
probit analysis n. the technique of using probits in statistical analysis.
ΘΚΠ
the world > relative properties > number > probability or statistics > [noun] > probability > unit of > analysis using probits
probit analysis1944
1944 Psychometrika 9 31 This method of probit analysis gives the maximum likelihood estimates of the unknown parameters.
1975 Jrnl. Royal Statist. Soc. C. 24 259 Probit analysis of dose-response curves and surfaces.
1993 Oxf. Econ. Papers 45 73 We then use the p variable as dependent variable in a probit analysis with independent variables t, σ, k, and Pt (where Pt is the relevant actual price).
This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).
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n.1934
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