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variance    音标拼音: [v'ɛriəns]
n. 不一致,变化,变异,分歧,不和

不一致,变化,变异,分歧,不和

variance
变异数 方差

variance
n 1: an event that departs from expectations [synonym:
{discrepancy}, {variance}, {variant}]
2: discord that splits a group [synonym: {division}, {variance}]
3: the second moment around the mean; the expected value of the
square of the deviations of a random variable from its mean
value
4: a difference between conflicting facts or claims or opinions;
"a growing divergence of opinion" [synonym: {discrepancy},
{disagreement}, {divergence}, {variance}]
5: the quality of being subject to variation [synonym:
{variability}, {variableness}, {variance}] [ant:
{invariability}, {invariableness}, {invariance}]
6: an official dispensation to act contrary to a rule or
regulation (typically a building regulation); "a zoning
variance"
7: an activity that varies from a norm or standard; "any
variation in his routine was immediately reported" [synonym:
{variation}, {variance}]

Variance \Va"ri*ance\, n. [L. variantia.]
1. The quality or state of being variant; change of
condition; variation.
[1913 Webster]

2. Difference that produces dispute or controversy;
disagreement; dissension; discord; dispute; quarrel.
[1913 Webster]

That which is the strength of their amity shall
prove the immediate author of their variance.
--Shak.
[1913 Webster]

3. (Law) A disagreement or difference between two parts of
the same legal proceeding, which, to be effectual, ought
to agree, -- as between the writ and the declaration, or
between the allegation and the proof. --Bouvier.
[1913 Webster]

4. (Statistics) The expected value of the square of the
deviation from the mean of a randomly distributed
variable; the second moment about the mean. This is also
the square of the {standard deviation}.
[PJC]

{At variance}, in disagreement; in a state of dissension or
controversy; at enmity. "What cause brought him so soon at
variance with himself?" --Milton.
[1913 Webster]

107 Moby Thesaurus words for "variance":
agreement to disagree, alienation, antagonism, apostasy, argument,
argumentation, at variance, change, clashing, conflict, contention,
contradiction, contrariety, contrast, controversy, counter-culture,
cross-purposes, debate, departure, deviation, difference,
difference of opinion, difficulty, disaccord, disaccordance,
disagreement, disapprobation, disapproval, disconformity,
discongruity, discord, discordance, discordancy, discrepancy,
discreteness, disharmony, disparity, dispute, dissatisfaction,
dissension, dissent, dissentience, dissidence, dissimilarity,
dissonance, distinction, distinctness, disunion, disunity,
divergence, divergency, diversity, dividedness, division,
dropping out, faction, far cry, fluctuation, heterogeneity,
in disagreement, in dispute, inaccordance, incompatibility,
incongruity, inconsistency, inconsonance, inequality,
inharmoniousness, inharmony, irreconcilability, jarring,
minority opinion, misunderstanding, mixture, negation,
nonagreement, nonassent, nonconcurrence, nonconformity, nonconsent,
odds, opposition, oppugnancy, otherness, polarization, quarrel,
recusance, recusancy, rejection, repudiation, repugnance, rift,
schism, secession, separateness, separation, severing, strife,
unconformity, underground, unharmoniousness, unlikeness,
unorthodoxy, variation, variegation, variety, withdrawal

VARIANCE, pleading, evidence. A disagreement or difference between two parts
of the same legal proceeding, which ought to agree together. Variances are
between the writ and the declaration, and between the declaration and the
evidence.
2.-1. When the variance is a matter of substance, as if the writ sounds
in contract, and the other in tort, and e converso, or if the writ demands
one thing or subject, and the declaration another, advantage may be taken of
it, even in arrest of judgment; for it is the writ which gives authority to
the court to proceed in any given suit, and, therefore, the court can have
no authority to hear and determine a cause substantially different from that
in the writ. Hob. 279; Cro. Eliz. 722. But if the variance is in matter of
mere form, as in time or place, when that circumstance is immaterial,
advantage can only be taken of it by plea in abatement. Yelv. 120; Latch.
173; Bac. Ab. Abatement, I; Gould, Pl. c. 5, Sec. 98 1 Chit. Pl. 438.
3.-2. A variance by disagreement in some particular point or points
only between the allegation and the evidence, when upon a material point, is
as fatal to the party on whom the proof lies, as a total failure of
evidence. For example; the plaintiff declared in covenant for not repairing,
pursuant to the covenant in a lease, and stated the covenant, as a covenant
to "repair when and as need should require;" and issue was joined on a
traverse of the deed alleged. The plaintiff at the trial produced the deed
in proof, and it appeared that the covenant was to "repair when and as need
should require, and at farthest after notice:" the latter words having been
omitted in the declaration. This was held to be a variance, because the
additional words were material, and qualified the effect of the contract. 7
Taunt. 385. But a variance in mere form or in matter quite immaterial, will
not be regarded. Str. 690. Vide 1 Vin. Ab. 41; 12 Vin. Ab. 63; 21 Vin. Ab.
538 Com. Dig. Abatement, G 8, H 7; Id.; Amendment, D 7, 8, V 3: Bail, R 7;
Obligation, B 4; Pleader, C 14, 15, L 24, 30; Record, C, D, F; Phil. Ev.
Index, 11. t. Stark. Ev. Index, h.t., Roscoe's Ev. Index, h.t.; 18 E. C. L.
R. 139, 149, 153 1 Dougl. 194; 2 Salk. 659; Harr. Dig. h.t. Chit. Pl. Index,
h.t.; United States Dig. Pleading II, d and e; Bouv. Inst. Index: h.t.


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  • Variance - Wikipedia
    Variance has a central role in statistics, where some ideas that use it include descriptive statistics, statistical inference, hypothesis testing, goodness of fit, and Monte Carlo sampling
  • 方差(variance)、标准差(Standard Deviation)、均方差、均方根值(RMS)、均方误差(MSE)、均方根误差(RMSE)
    方差 (variance):衡量随机变量或一组数据时离散程度的度量。 概率论中方差用来度量随机变量和其数学期望(即均值)之间的偏离程度。 统计中的方差(样本方差)是每个样本值与全体样本值的平均数之差的平方值的平均数。 概率论中的方差表示方法 :
  • 偏差(Bias)与方差(Variance) - 知乎
    Bias和Variance分别从两个方面来描述我们学习到的模型与真实模型之间的差距。 Bias 是用 所有可能的训练数据集 训练出的 所有模型 的输出的 平均值 与 真实模型 的输出值之间的差异。 Variance 是 不同的训练数据集训练出的模型 输出值之间的差异。
  • 方差_百度百科
    方差(variance)这个名词率先由罗纳德·费希尔(Ronald Fisher)在1918年发表的论文《孟德尔遗传假定下的亲缘之间的相关性》 (《The Correlation between Relatives on the Suppositionof Mendelian Inheritance》 [3])中提出。
  • variance - 搜索 词典
    2 The estimated variance in the yield of apple and pear trees if the data in the database is only a sample of the total orchard population 如果 数据库 中 的 数据 只是 整个 果园 的 一个 样本, 那么 此 值 是 苹果 树 和 梨树 产量 的 估算 方差。
  • 平均值 (Mean)、方差 (Variance)、标准差 (Standard Deviation) (转)
    为什么使用标准差? 一个标准差 68%, 两个标准差 95%, 三个标准差 99%。 标准差定义是总体各单位标准值( xi)与其平均数(μ)离差平方和的算术平均数的 平方根。它反映组内个体间的离散程度。 所有数减去其平均值的平方和,所得结果除以该组数之个数(或个数减一,即变异数),再把所得值开
  • Variance - GeeksforGeeks
    Variance is defined as the square of the standard deviation, i e , taking the square of the standard deviation for any group of data gives us the variance of that data set
  • What Is Variance in Statistics? Definition, Formula, and Example
    Variance measures how far data points are spread out from the mean A higher variance indicates greater variability and risk, while a lower variance indicates more consistent results
  • VARIANCE中文 (简体)翻译:剑桥词典 - Cambridge Dictionary
    be at variance (with someone something) to be in disagreement with someone or something, or to be different from him, her, or it 与…有分歧;与…存在差异
  • 方差和标准差 Variance Standard Deviation | 数据分析教程 - 盖若
    方差(Variance)和标准差(Standard Deviation)是统计和概率中重要参数。 科学家发现了现实中很多情况,如果只用平均值没有任何参考意义,甚至会误导决策的判断,历史上由罗纳德·费雪首先提出了方差的概念来解决这个问题。





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