The following time series demand data will be used to produc

The following time series demand data will be used to produce a demand forecast for 2015 Plot the data. Do you notice a trend effect? A seasonal effect? Develop seasonal indices for each quarter using the technique demonstrated in class. Depersonalize the demand data. Develop a linear trend line to estimate the trend component. State the trend line conation you developed.

Solution

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c.

The linear trend equation is shown below: