how does a 2 day frequency work? what is the difference between the frequency of each day of record predicting period and the model used by the radio station which model to use to predict the frequency of each record? how to use a rima model how to get two day prediction when to use a correlated model what is the basis of a two day music chart? how to predict frequency of a two day music chart how to use ARIMA models how to predict the frequency of a chart how to model freq how to calculate the frequency of a music chart on two days what does correlated residual mean why do you use a weighted least square model is frequency correlated does the correlated residual influence music chart frequency? how can i use a two day frequency model does radio frequency correlated how to use the correlated residuals on the frequency of a two day chart when predicting two-day frequencies, what is used