阿尔法系数
- 网络Alpha;coefficient alpha
阿尔法系数-
本文在合理假定的基础上，借助于分析技巧，推出了教育测量学中信度系数的上下界估计。该上下界是著名的kuder－Richardson公式20[4]及Cronbach阿尔法系数[3]的推广。
Under some reasonable assumptions , using some elementary analytic techniques , the author obtains lower and upper bounds for the reliability coefficients in the Educational Measurement , thus generalizing the well - known Kuder - Richardson 's Formula 20 and the Cronbach ' alpha Cronbach 's alpha coofficient method .
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投资者在金融危机期间已经认识到，亚洲对冲基金通常提供的是市场回报率，即贝塔系数（β），而非与市场波动不相关、基于技术的回报率，即阿尔法系数（α）。
Investors had already learnt during the financial crisis that Asian hedge funds mostly provided market returns , known as beta , rather than uncorrelated skill-based returns , or alpha .