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Q4: The data presented below represents the quarterly Southdown revenues earned during the period 2001-2003. Assume that the time series model is multiplicative and without

Q4: The data presented below represents the quarterly Southdown revenues earned during the period 2001-2003. Assume that the time series model is multiplicative and without trend component. Compute seasonal indiees and deseasonaljze the data. [15]

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