Question 16 (1 point) Sand If the time series data has a significant upward trend, the weighted moving average method tends to ____ the actual quantity overestimate underestimate Question 17 point Sed Time series decomposition breaks down the time series data in to the trend seasonality, and random variation components. In the time series plot, the trend component is always a straight line which can be upward, downwand, or fi True False Question 18 (1 pointed If the time series data has a significant upward trend, the moving average method tends to the actual quantity overestimate underestimate