[15分] 請問響stats黎講, zero-mean 有咩壞處呀?

zero-mean係零均值

如果冇記錯係指全部value係冇差距...即係每一個value都一樣....

A statistical calculation of how much the individual values of a sequence deviate from the mean value. To compute the nth moment, the difference of each value from the mean is lifted to the nth power and summed.