Open Physics-Lee opened 11 months ago
https://physics-lee.github.io/2023/10/22/Before_Sampling_vs_After_Sampling/
There is a famous sentence in statistics. Before sampling, X is a random variable. After sampling, X is a number. These are not useless sentence. Before sample, $X, E(X), Var(X), Cov(X,Y), r(X,Y)$ a
https://physics-lee.github.io/2023/10/22/Before_Sampling_vs_After_Sampling/
There is a famous sentence in statistics. Before sampling, X is a random variable. After sampling, X is a number. These are not useless sentence. Before sample, $X, E(X), Var(X), Cov(X,Y), r(X,Y)$ a