why do percent based forecast error measures assume a meaningful zero? why do percentage error measures assume a meaningful zero? why do percentage error measures assume a meaningful zero? why percentage errors why do percentage errors assume zero? how do percentage based forecast error measures assume a meaningful zero? percentage error what makes percentage error mean why do percentage errors assume a meaningful zero why percentage error definition why do percentage error measures assume a meaningful zero? why do percent error measures assume a meaningful zero? why do percentage errors assume a meaningful zero? what is percentage error percent error meaning why use the percent error model for predicting temperature? why do percentage errors assume zero? do percentage error measures assume a meaningful zero? why do percentage error measures assume a meaningful zero? why do percent errors assume a meaningful zero?