The probable error of a correlation coefficient is not a thing which can be deduced from first principles, but must be found empirically.
相关系数的可能误差不是可以从第一原理推导出来的东西,而是必须通过经验找到的。
The idea of being a rock star is as stupid as the idea of being a movie star. It's all a joke.
I love to practice. When I'm not playing, I'm practicing.