| 单词 |
expected |
| 释义 |
expected, ppl. a.|ɛkˈspɛktɪd|
[f. expect v. + -ed1.]
Looked for, anticipated.
1586A. Day Eng. Secretary ii. (1625) 28 You would according to your honourable promises have done me an expected good. 1664H. More Myst. Iniq. 109 That expected eminent false prophet who does antichristianly oppose himself against the Spirit of truth. 1712Pope Messiah 21 Swift fly the years, and rise th' expected morn! 1828Scott F.M. Perth xix, Busied with things about the expected combat. 1875Jowett Plato (ed. 2) I. 101 Fear is not of the present..but is of future and expected evil. Mod. The mod. English give is irregular; the expected form would be yeve.
Hence exˈpectedly adv., in the manner expected, according to expectation; cf. unexpectedly.
1758H. Walpole Let. H. Mann 31 May, Lord Mansfield..unexpectedly is supported by the late Chancellor..and very expectedly by Mr. Fox.
Add:2. Special collocation: expected value Math., an estimate or prediction of the value of a given random variable or of some function of it, based on known or assumed facts about its distribution, and calculated as the sum or integral of all possible values, each multiplied by their respective probabilities.
1915A. Fisher Math. Theory of Probabilities i. xix. 97 Russian and Scandinavian writers and the followers of the Lexis statistical school of Germany have preferred to make another quantity known as the ‘probable’ or ‘*expected value’, the nucleus of their investigations. 1958M. G. Kendall Adv. Theory of Statistics I. 51 The notation E derives from the fact that in probability theory such values are often known as ‘expected values’ or ‘expectations’. 1980A. J. Jones Game Theory iv. 177 Suppose on the toss of a fair coin one can win $20 on heads and lose $10 on tails. The expected value of the game is $5, and it seems, therefore, that we should accept the bet. |
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