how to aggregate sales data how to use different levels of aggregation for different predictors does aggregation work for forecasts if monthly aggregates and a yearly how to aggregate data for different forecast periods why do we aggregate monthly and annual what is the difference between aggregates and regression why do we aggregate daily data to annual data can you afg a year and yearly prediction how are different aggregation levels used in regression models how do you apply different aggregation how to use aggregations why use different levels of aggregation how to use monthly data in a regression based on seasonal data how to use different aggregation to predict how can you aggregate data can you aggregate data to predict a month can you use multiple data sets to predict how to use different levels of aggregation what type of model to use to predict by month of a month