The quarterly sales data (number of copies sold) for a college textbook over the past three years follow.

[answerhappygod]

The quarterly sales data (number of copies sold) for a college
textbook over the past three years follow.

The Quarterly Sales Data Number Of Copies Sold For A College Textbook Over The Past Three Years Follow 1 (107.06 KiB) Viewed 31 times

The Quarterly Sales Data Number Of Copies Sold For A College Textbook Over The Past Three Years Follow 2 (95.84 KiB) Viewed 31 times

The Quarterly Sales Data Number Of Copies Sold For A College Textbook Over The Past Three Years Follow 3 (128.81 KiB) Viewed 31 times

Quarter 1 2 3 4 Year 1 1690 940 2625 2500 Year 2 1800 900 2900 2360 Year 3 1850 1100 2930 2615

e. Deseasonalize the time series (to 3 decimals). Year Quarter Deseasonalized Value 1 1 1876.948 2 1933.226 3 4 2 1 2 3 4 3 1 2 3 4

f. Compute the linear trend equation for the deseasonalized data (to 2 decimal if necessary). Deseasonalized Value = 1850.9 + 25.2 Period Compute the forecast sales using the linear trend equation (to 1 decimal). Forecast for quarter 1 2178.1 Forecast for quarter 2 Forecast for quarter 3 Forecast for quarter 4 g. Adjust the linear trend forecasts using the adjusted seasonal indexes computed in part (c) (to the nearest whole number). Forecast for quarter 1 Forecast for quarter 2 Forecast for quarter 3 Forecast for quarter 4