"A children's story that can only be enjoyed by children is not a good children's story in the slightest."
一个只能被儿童欣赏的儿童故事根本不是一个好的儿童故事。
Nothing will have taken place but the place itself.
Data tells you what's happening, but only intuition can tell you why.
从n对观测值的样本中获得的相关系数的可能误差是sqrt((1-r²)/(n-2))。