Word · Frequency #7319
variance
差异，不一致，分歧
the fact or quality of being different, divergent, or inconsistent
- 1.
The act of varying or the state of being variable.
变化的行为或可变的状态。
- 2.
A difference between what is expected and what is observed; deviation.
预期与实际观察之间的差异；偏差。
- 3.
The state of differing or being in conflict.
分歧或冲突的状态。
- 4.
An official permit to do something that is ordinarily forbidden by regulations.
官方颁发的、允许做通常被规章禁止之事的许可证。
- 5.
A discrepancy between two legal documents.
两份法律文件之间的不一致。
- 6.
A departure from a cause of action originally in a complaint.
偏离原起诉状中的诉讼理由。
- 7.
The second central moment in probability; the square of the standard deviation.
概率中的二阶中心矩；标准差的平方。
- 8.
The number of degrees of freedom in a system.
系统中自由度的数量。
- 9.
Covariance and contravariance generally.
通常指协变与逆变。
方差；特许，豁免；变化的行为或可变的状态。；预期与实际观察之间的差异；偏差。；分歧或冲突的状态。
In use
His account of the events was at variance with the official report.
The variance of the data set was calculated to measure the spread of the values.
The city council granted a variance to allow the building to exceed the height limit.
variance in sth
表示某方面存在差异或变化。
There is considerable variance in the test results.
测试结果存在显著差异。
variance between sth and sth
表示两者之间的差异。
The variance between the two groups was statistically significant.
两组之间的差异具有统计学显著性。
variance of sth
统计学中表示方差。注意与日常用法的区别。
Connections
Collocations
- at variance with
- 与…不一致，与…有分歧
- His actions are at variance with his promises.他的行为与他的承诺不一致。
- variance analysis
- 方差分析
- The researcher used variance analysis to compare the groups.研究者使用方差分析来比较各组。
- genetic variance
- 遗传方差
- Genetic variance contributes to the diversity of traits in a population.遗传方差导致种群内性状的多样性。
- sample variance
- 样本方差
- The sample variance is an estimate of the population variance.样本方差是总体方差的估计值。
- variance reduction
- 方差缩减
- These techniques are used for variance reduction in Monte Carlo simulations.这些技术用于蒙特卡洛模拟中的方差缩减。
Learner notes
Memory Tip
联想“vary”（变化）+“ance”（名词后缀），变化带来的差异就是方差。
Context & Register
统计学，数学，数据分析（正式术语）
Pronunciation & Spelling
All listed words share the same -ance ending pronounced /əns/, matching the ending of variance.
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.