| 释义 |
estimator|ˈɛstɪmeɪtə(r)|
Also 8 -er.
[a. L. æstimātor, agent-n. f. æstimāre: see estimate v. and -or.]
One who estimates.
a1665J. Goodwin Filled w. the Spirit (1867) 406 Our Saviour..was the best estimator concerning matters of profit. 1768–74Tucker Lt. Nat. (1852) I. 363 We are very bad estimaters of happiness. 1861Lond. Rev. 20 Apr. 434/2 They are by no means the keenest estimators.
Add:2. Statistics. A rule, method, or criterion for arriving at an estimate of the value of a parameter; a quantity used or evaluated as such an estimate.
1939E. J. G. Pitman in Biometrika XXX. 399 The mean, median, or any such point of the fiducial distribution is a function of the x which has the estimator property. 1946M. G. Kendall Adv. Theory Statistics II. xvii. 2 We draw a distinction between the method or rule of estimation, which, following Pitman, we shall call an Estimator, and the value to which it gives rise in particular cases, the Estimate. 1968P. A. P. Moran Introd. Probability Theory v. 226 From this sample we construct the ‘sample distribution’ Fn(x) ... Suppose..that we merely wish to estimate F(x) at a particular point x so that the natural estimator to use is Fn(x) . 1976Biometrika LXIII. 437 The right-hand side of (2.3) need not converge, but, if we assume that it does, the expression (2.3) suggests the unbiased estimator for Δ(t)Δ{caret}(t) = n1t - n2t2 + n3t3 - [etc.]. 1987Amer. Sociol. Rev. LII. 382 The breakdown point of an estimator assesses its ability to resist the effects of contamination. |