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QUESTION 28 Inbox (810) - natt A causal research model is based on the assumption that the independent variable is related to the dependent variable there is a relationship between the time series and the dependent variable the variable being forecast is related to other variables in the environment there is a relationship between the time series and the independent variable QUESTION 29 Which of the following is a causal forecasting method? Nalve Moving average Weighted moving average Trend adjusted exponential smoothing Linear regression QUESTION 30 Over the long term, which of the following forecasting models will likely require carrying the least amount of da Naive Simple mean Exponential smoothing Weighted moving average Moving average