Solution-Deseasonalize the data and use the deseasonalized

Consider the Costello Music Company time series in Problem 29.

a. Deseasonalize the data, and use the deseasonalized time series to identify the trend.

b. Use the results of part (a) to develop a quarterly forecast for next year based on trend.

c. Use the seasonal indexes developed in Problem 29 to adjust the forecasts developed in part (b) to account for seasonal effects.

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Deseasonalize the data and use the deseasonalized time : consider the costello music company time series in problem 29.a. deseasonalize the data and use the deseasonalized time

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