样本方差 meaning in Chinese
sample dispersion
sample variance
Examples
- The analysis of how the training model influenced the students " thinking ability , creativity and study performance is done by using a few statistical methods including analysis of double samples " variance , supposition of double sampling , testing of significant difference
运用双样本方差分析，双样本假设、差异显著性检验等几种统计方法，分析了六阶段思维策略训练的课堂操作模式对学生思维能力、创新意识、学习成绩的影响。 - The paper accounts the importance and the necessity of the forecasting research to the stock return volatility of our country , and the use in practice of the forecasting about the stock return volatility , firstly , stock market of our country is divided into large scale stock 、 middle scale stock and small scale stock on the basis of stock size . secondly , according to the basic method of the mathematical statistics ， the behavior of the return volatility about single stock is described by using the model of the rolling variance estimates 。 through the relation of daily returns volatility and weekly returns volatility and the forecasting accuracy of the volatility forecasting model to various stock scale ， we do practical analysis with the forecasting research to return volatility of single stock market
在个股收益波动性的可预测性研究方面，首先按市值规模大小将我国股票分为大盘股、中盘股和小盘股，然后利用数理统计的基本方法，用滚动样本方差估计模型描述个股市场收益波动性的行为，并对三种股票日收益率序列及周收益率序列波动之间的关系以及波动预测模型对各种股盘的预测准确性进行了实证分析和结果检验。