How can we easily assume the 'independence of error term(and so many other factors)??
Once, I got the question which is, "How can we easily assume the 'independence of error term(and so many other factors)??" Since, in many field, data necessarily are 'autocorrelated'. For example, the typical tool which assume those of normality and non-autocorrelations, Control Chart, are definetely autocorrelated (just extent matters).Obviously, production process are impacted by the outside tem...