if pacf is non significant what type of model do i create acf/pacf analysis for series can you use a pacf as an acf in a model how to model acac what is acf pacf which acf does not show significance? how to model acf/pacf if the pacf or the acf show no significance what is the mean does pacf mean aacf can a cmf pacf be used in an arma model? is the acf and pacf significant in the model can i use an acf in an arma model what is the acf of the macs model are acf and pacf significant what is the value of the acf can you use acf in ar how to do linear regression with acf what does acf mean can an ar model be used to model the volatility of the returns? what is the range of acf and pacf