This question has more than one correct answer and they all must be selected. Select all statements that are not true. Select 3 correct answer(s) Aggregating the sales of several proucts (product family forecasts) provides less accurate forecasts for total sales than developing separate forecasts for each product and adding up to forecast values. A tracking signal can be set at a predetermined level to alert a manager that action needs to be taken to modify the forecasting model. Changes in the dependent variable must take place with sufficient lead time before the associated change in the independent variables in order for a causal model to be useful as a forecasting tool. The stability of a moving average forecast is inversely related to the number of periods included in the moving average. Forecasts will always be below or above the actual demand where a trend is present, unless exponential smoothing with two components is applied