並前往https://blog.xuite.net/luiyeetung/hkblog/165068359-%E8%B2%A1%E7%B6%93%E8%A9%9E%E5%BD%99%E2%94%80%E8%AE%8A%E7%95%B0%E4%BF%82%E6%95%B8(Coefficient+of+Variation%EF%BC%8CCV)(C.13)