词语:方差热度:89

词语方差拆分为汉字:

方字的拼音、笔画、偏旁部首、笔顺、繁体字,方字字源来历,方字演变

四个角都是90度直角的四边形或六个面都是方形的立体;正~形.长~形数学上指某数自乘的积:~根。平~。开~。人的品行端正:~正。~直。一边或一面:~向。~面。地区,地域:地~。~志。~言。~物。~圆。~隅(边疆)。~舆(指领域,亦指大地)。办……

差字的拼音、笔画、偏旁部首、笔顺、繁体字,差字字源来历,差字演变

1. 差 [chà]2. 差 [chā]3. 差 [chāi]4. 差 [cī]差 [chà]错误:话说~了。不相当,不相合:~不多。缺欠:还~十元钱。不好,不够标准:~等。成绩~。差 [chā]不同,不同之点:~别。~距。~额。~价。大致……

 

查询词语:方差,试一试,用方差来写一句话,用方差造句。

汉语拼音:fāng chā

 

词语方差基本解释

概率论的基本概念。是用来表示随机变量与其期望之间离散程度的一个量。若随机变量ξ的期望为eξ,则ξ与eξ的偏差平方的加权平均e(ξ-eξ)2,称为ξ的方差,常记作dξ或varξ。随机变量的方差由其概率分布唯一确定,故也称某分布的方差。为使量纲一致,常应用方差的平方根dξ,称为根方差”或均方差”。

 

词语方差双语例句

双语例句
  1. Nevertheless, the plan-and-track method is often applied to projects with high variance, usually with disappointing results.

    尽管如此,计划及跟踪方法还经常应用于高方差的项目中,通常导致令人失望的结果。

  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。

  3. However, the covariance decomposition of the PS has not previously been used to evaluate medical judgment.

    然而,方差分解的PS以前未曾用于评价医疗判决。

  4. The next step in the simple linear regression procedure is to determine if the remaining squared error of prediction is acceptable or not.

    这个简单线性回归过程中的下一步是确定其余的预测方差是否可以接受。

  5. The correlation coefficient, like the covariance, is a measure of the extent to which two measurement variables "vary together. "

    与协方差一样,相关系数是描述两个测量值变量之间的离散程度的指标。

  6. Nevertheless, even if the euro system was not at the heart of the crisis, it needs to be able to withstand two standard deviation shocks.

    然而,即便欧元体系没有处于危机的核心,它也必须能够顶住2倍标准方差事件的冲击。

  7. The app would be very simple, it would have controls allowing the user to select the voice and speed, pitch, and variance of that voice.

    这个应用程序将非常简单,它会控制,允许用户选择的声音和速度,音高,那声音和方差。

  8. You can use it to turn your variance measurement into a standard deviation measurement, as shown in Listing 8.

    您可以利用此函数将您的样本方差计算转换为样本标准差计算,如清单8所示。

  9. It is often a burden and time consuming to perform an analysis of variance on the raw data obtained from product experiments.

    在对某一产品停止实验后,依据原始数据停止方差剖析是件烦琐的任务,需求破费不少工夫。